/** Lausn, hugbunadur - www.lausn.is **/

var priceBensin = 226;
var priceDisel = 231;
var priceMetan = 120;

var imgRoot = "http://os.lausn.is/images/";
var theCars = new Array();
var subCars;
var framleidendur = new Array();
var tegundir = new Array();
var theSubCars = new Array();

var theRoads = new Array();
var depart = new Array();
var selectedDepart = 0;
var selectedArrive = 0;

var currentSelectedRow = new Array();
var btns = new Array();
var msie = false;
var lang = "is";

var firstTime = true;

function msg (txt) { }

function msg2( txt ) {
	//document.getElementById( "msg" ).innerHTML += " " + txt + " /";
	//document.getElementById( "msg" ).innerHTML += txt + "<br/>";
}
function dbug( txt ) {
	//document.getElementById( "msg" ).innerHTML += " " + txt + " /";
	//document.getElementById( "msg" ).innerHTML += txt + "<br/>";
}

function addClass( node, clss ) {
	removeClass( node, clss );
	var c = node.className;
	c += " " + clss;
	c = c.replace( "  ", " " );
	node.className = c;
}

function removeClass( node, clss ) {
	var c = node.className;
	c = c.replace( clss, "" );
	node.className = c;
}

function scanForAttribute( node, elms, attr, value ) {
	var ok = false;
	for( var i=0; i < node.childNodes.length; i++ ) {
		n = node.childNodes[i];
		if( n.nodeType == 1 ) {
			var a = n.getAttribute( attr );
			if( attr == "class" ) 
				ok = n.className == value; /* MSIE doesn't see class as attribute... */
			else
				ok = n.getAttribute( attr ) == value;
			if ( ok ) elms.push( n );
				scanForAttribute( n, elms, attr, value );
		}
	}
}

function getElementsByClass( clss ) {
	var elms = new Array();
	scanForAttribute( document, elms, "class", clss );
	return elms;
}

function currency( num ) {
	if( lang == "en" ) 
		return formatNum( parseFloat(num) / 100.0, 2 );

	return formatNum( num );
}

function formatNum( num, dec ) {
	var numStr = "" + parseFloat( num );
	if( numStr.indexOf("e") > 0 ) {
		numStr = "" + parseFloat( num ).toFixed( dec );
	}
	msg( "n=" + numStr );
	var i = numStr.indexOf(".");

	var integral = numStr;
	if( i > -1 ) integral = numStr.substr( 0, i );
		msg( "i=" + integral );

	var fraction = "";
	if(dec) {
		fraction = parseFloat(num-integral).toFixed( dec );
		if( fraction.substr(0,1) == "." ) fraction = "0" + fraction;
	}
	msg( "f=" + fraction );

	/* thousand separator every three digits */
	var newInt = "";
	var j = 0;
	for( i=integral.length-1; i>-1; i-- ) {
		var c = integral.substr( i, 1 );
		if ( j !=0 && j % 3 == 0 ) newInt = "." + newInt;
		newInt = c + newInt;
		j++;
	}

	var newNum = newInt;
	var newFrac = "";

	/* fix decimal places to dec number of slots */
	if( dec ) newFrac = String(fraction).substr(2,48);

	/* strip fraction if fraction has no value */
	//if( parseFloat( newFrac ) == 0 ) newFrac = "";
	msg( "nf=" + newFrac );

	if( newFrac != "" ) newNum = newNum + "," + newFrac;

	return newNum;

}

function formatNumOldToo( num, dec ) {
	var n = "";
	if( dec ) {
		n1 = Math.pow(10, dec);
		n2 = Math.round(num * n1);
		n = "" + (n2 / n1);
		i = n.indexOf(".");
		if (i >= 0)
		n = n.substr(0, i) + "," + n.substr(i + 1, n.length - 1);
	}
	else
	n = ""+Math.round( num );

	/* thousand separator every three digits */
	var f = "";
	var j = 0;
	var p = "";
	var k = n.indexOf(",");
	if( k==-1 ) {
		k = n.length-1;
	} else {
		p = n.substr(k+1, n.length);
	}

	for( var i=k; i>-1; i-- ) {
		var c = n.substr( i, 1 );
		if ( j != 0 && j % 3 == 0 ) f = "." + f;
		f = c + f;
		j++;
	}

	if(p != "") f = f + p;

	return f;
}

function formatNumOld( num, dec ) {
	var n = "";
	if( dec ) 
	n = ""+Math.floor( num );
	else
	n = ""+Math.round( num );
	var f = "";
	j = 0;

	/* thousand separator every three digits */
	for( var i=n.length-1; i>-1; i-- ) {
		var c = n.substr( i, 1 );
		if ( j !=0 && j % 3 == 0 ) f = "." + f;
		f = c + f;
		j++;
	}

	/* decimal places */
	if( dec ) {
		f += ",";
		var fr = parseFloat(num-n).toFixed( dec );
		fr = "" + parseFloat( fr ); //strip trailing zeros from fraction
		var r = fr.substr( 2, fr.length );
		f += r;
	}

	/* Make sure we don't get smth like 1,  */
	if (f.substr(f.length - 1, 1) == ",")
	f += "0";

	return f;
}

function removeChildren( node ) {
	var x = node.childNodes.length;
	for( var i=0; i<x; i++ ) {
		node.removeChild( node.childNodes[0] );
	}
}

function mouseoverTR() {
	this.className = "subRowOver";
}

function mouseoutTR() {
	if( this != currentSelectedRow[1] && this != currentSelectedRow[2] )
	this.className = "subRow";
}

function clickTR( node, p ) {
	removeClass( document.getElementById( "undirtegundir"+p+"TD" ), "focus" );
	if( currentSelectedRow[p] ) currentSelectedRow[p].className = "subRow";
	if( node != currentSelectedRow[p] ) node.className = "subRowSelected";
	currentSelectedRow[p] = node;
}

function clickTR1() {
	var p = this.getAttribute( "panel" ); /* panel number ( 1 or 2 ) */
	clickTR( this, p );
	document.getElementById( "calc"+p ).className = "notHidden";
	calculateResult( this.getAttribute( "panel" ));
}

function clickTR2() {
	clickTR( this, 1 );
	document.getElementById( "calcInnan" ).className = "";
	document.getElementById( "calcUtan" ).className = "";
	calculateInnanb();
	calculateUtanb();
}

function clickTRCO2() {
	clickTR( this, 1 );
	document.getElementById( "calcCO2" ).className = "";
	calculateCO2();
}

function clickTRLabb() {
	clickTR( this, 1 );
	document.getElementById( "calcLabb" ).className = "";
	calculateLabb();
}

function clickTREnergyClass() {
	clickTR( this, 1 );
	document.getElementById( "calcEnergyClass" ).className = "";
	calculateEngeryClass();
}

function clickTRMetan() { // the same as clickTR1
	var p = this.getAttribute( "panel" ); /* panel number ( 1 or 2 ) */
	clickTR( this, p );
	document.getElementById( "calc"+p ).className = "notHidden";
	calculateResult( this.getAttribute( "panel" ));
}

/** calculate Unit Conversion **/
function calcUnits(src) {
	var v = document.getElementById( "i"+src ).value
	var watts = parseFloat( document.getElementById( "pwatts" ).value );
	var jules = parseFloat( document.getElementById( "pjules" ).value );
	var x = parseFloat( v.replace(",",".") );
	var r, dst;
	if( v != "" ) {
		if( src=="watts" ) {
			r = "" + parseFloat( x * watts * (3600 / jules) ).toFixed(13);
			//r = "" + parseFloat(r).toFixed(3);
			r = "" + parseFloat(r);
			dst = "jules";
		} else {
			r = "" + parseFloat( (x / 3600) * jules / watts ).toFixed(13);
			//r = "" + parseFloat(r).toFixed(3);
			r = "" + parseFloat(r);
			dst = "watts";
		}
	} else {
		r = "";
	}
	document.getElementById( "i"+dst ).value = r.replace(".",",") ;

	var p = 1;
	var vatt = document.getElementById( "iwatts" ).value.replace(",",".") * watts;
	var jule = document.getElementById( "ijules" ).value.replace(",",".") * jules;

	for( var i=1; i<6; i++ ) {
		var w = parseFloat( vatt / p ).toFixed(13); //toFixed keeps number in decimal format
		var j = parseFloat( jule / p ).toFixed(13);
		w = formatNum( w , 6 );
		//w = w.replace(/\./, "");
		j = formatNum(  j , 6 );
		//j = j.replace(/\./, "");
		var wa = w.split(",");
		var ja = j.split(",");
		if( wa[0]=="" ) wa[0]="0";
		if( ja[0]=="" ) ja[0]="0";
		document.getElementById( "w"+i ).innerHTML = wa[0];
		document.getElementById( "j"+i ).innerHTML = ja[0];
		var lw = wa[0].length;
		var lj = ja[0].length;
		var sw = "";
		var sj = "";
		if( parseInt(wa[1]) > 0 ) /*only add fraction if fraction has value*/
		if( lw < 3 ) /* only add fraction for numbers lower than three digits */
		sw = "," + ( wa[1]  );
		if( parseInt(ja[1]) > 0 ) 
		if( lj < 3 )
		sj = "," + ( ja[1]  );
		document.getElementById( "wf"+i ).innerHTML = sw;
		document.getElementById( "jf"+i ).innerHTML = sj;
		p *= 1000;
	}
	unitDraw();
}

/* calculate window insulation */

function setTemp (temp) {
	document.getElementById( "medalhiti" ).innerHTML = temp;
	calcGluggi();
}
function setTemp2( temp ) {
	document.getElementById( "medalhiti" ).innerHTML = temp;
	calcKlaedning();
}
function calcGluggi() {
	var insulation = new Array( 1.9, 1.7, 1.9, 1.7, 1.4, 1.2, 1.6, 1.1 );
	//var prices = new Array( 8160, 8910, 12027, 13027, 13074, 14037, 10000, 10000 );
	// Prices changed to same default for all glass types on Aug 20 2010, hard to maintain actual prices
	var prices = new Array( 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000 );
	var selectedGluggi = parseInt( document.getElementById( "C2" ).value );
	var selectedPrice = prices[ selectedGluggi ];
	if( firstTime ) {
		document.getElementById( "fm_verd" ).setAttribute( "value", selectedPrice );
		document.getElementById( "fm_verd" ).innerHTML = formatNum( selectedPrice );
		firstTime = false;
	}

	var medalhiti = parseFloat( document.getElementById( "medalhiti" ).innerHTML );
	var oskahiti = parseFloat( document.getElementById( "hiti" ).getAttribute( "value" ) );
	var ferm = parseFloat( document.getElementById( "ferm" ).getAttribute( "value" ) );
	var C1 = parseFloat( document.getElementById( "C1" ).value );
	var C2 = insulation[ selectedGluggi ];
	var year = parseFloat( document.getElementById( "year" ).getAttribute( "value" ) );
	var verd = parseFloat( document.getElementById( "verd" ).getAttribute( "value" ) );
	var A3 = ( oskahiti - medalhiti ) * 24 * 365 / 1000;
	var kwh = ( C1 - C2 ) * A3 * ferm;
	var totalKwh = kwh * year;
	var totalKr = totalKwh * verd;

	document.getElementById( "total_kwh" ).innerHTML = formatNum( totalKwh );
	document.getElementById( "total_kr" ).innerHTML = formatNum( totalKr );

	var fmkr = parseFloat( document.getElementById( "fm_verd" ).getAttribute( "value" ) );
	var totalFmkr = ferm * ( 1900 + fmkr ); //1900 er isetningarverd pr ferm.
	var endgrTimi = totalFmkr / ( kwh * verd );

	document.getElementById( "total_efni" ).innerHTML = formatNum( totalFmkr );
	document.getElementById( "endurgr_timi" ).innerHTML = formatNum( endgrTimi, 1 );
}

function calcKlaedning() {
	var medalhiti = parseFloat( document.getElementById( "medalhiti" ).innerHTML );
	var oskahiti = parseFloat( document.getElementById( "hiti" ).getAttribute( "value" ) );
	var ferm = parseFloat( document.getElementById( "ferm" ).getAttribute( "value" ) );
	var Uf = parseFloat( document.getElementById( "Uf" ).value );
	var d = parseFloat( document.getElementById( "d" ).value );
	var year = parseFloat( document.getElementById( "year" ).getAttribute( "value" ) );
	var verd = parseFloat( document.getElementById( "verd" ).getAttribute( "value" ) );

	var A3 = ( oskahiti - medalhiti ) * 24 * 365 / 1000;
	var Ue = 1 / ( ( d / 0.042 ) + ( 1 / Uf ) );
	var kwh = ( Uf - Ue ) * A3 * ferm;

	var totalKwh = kwh * year;
	var totalKr = totalKwh * verd;

	document.getElementById( "total_kwh" ).innerHTML = formatNum( totalKwh );
	document.getElementById( "total_kr" ).innerHTML = formatNum( totalKr );
}

function calculateEngeryClass() {
	var node = currentSelectedRow[1]; //the selected node from undirtegund
	var engine = node.getAttribute( "engine" );

	classesBensin = new Array( 18.2, 15.3, 14.2, 12.4, 11.7, 10.4, 0.0 );
	classesDisel = new Array(  20.5, 17.3, 16.1, 14.1, 13.2, 11.9, 0.0 );
	classesOther = new Array(   0.0,  0.0,  0.0,  0.0,  0.0,  0.0, 0.0 );
	var theClasses = classesBensin;
	if( engine == "disel" ) 
	theClasses = classesDisel;
	else if( engine == "rafmagn" )
	theClasses = classesOther;
	else if( engine == "etanol" )
	theClasses = classesOther;
	else if( engine == "metan" )
	theClasses = classesOther;

	var e = 100 / node.getAttribute( "medal" ); //efficiency

	/* hide all indicators */
	for( var i = 0; i < 7; i++ ) {
		c = "ABCDEFG".substr(i,1);
		var indicator = document.getElementById("indicator" + c);
		indicator.style.display = "none";
	}

	/* show the calculated indicator */
	for( var i = 0; i < 7; i++ ) {
		if( e > theClasses[i] ) {
			c = "ABCDEFG".substr(i,1);
			var indicator = document.getElementById("indicator" + c);
			indicator.style.display = "block";
			break;
		}
	}
	document.getElementById( "ecC02" ).innerHTML = "<sub>&nbsp;</sub>" + node.getAttribute( "co2" ); //dummy sub to align with previous cell
	// document.getElementById( "ecKmLtr" ).innerHTML = formatNum( 100 / node.getAttribute( "medal"), 1 ) ;
	document.getElementById( "ecInnan" ).innerHTML = formatNum( node.getAttribute( "innanb" ), 1 );
	document.getElementById( "ecUtan" ).innerHTML = formatNum( node.getAttribute( "utanb" ), 1 );
	document.getElementById( "ecBland" ).innerHTML = formatNum( node.getAttribute( "medal" ), 1);
	var unit = "ltr";
	if( engine == "rafmagn" )
	unit = "kWh";
	else if( engine == "metan" )
	unit = "Nm<sup>3</sup>";
	document.getElementById( "ecUnit" ).innerHTML = unit;

	if( isVisthaefur( node ) ) {
		document.getElementById( "rvk_parking" ).style.display = "";
	} else {
		document.getElementById( "rvk_parking" ).style.display = "none";
	}
}

/* this is just a nicety for browsers that can */ 
function unitDraw() {
	var ut = document.getElementById( "unitsTable" );
	var st = document.getElementById( "unitsTableSum" );
	var w = ut.clientWidth;
	var h = ut.clientHeight;
	var c = document.getElementById( "unitbox" );
	if(c) {
		c.setAttribute("width", w);
		c.setAttribute("height", h);
	}
	var ctx;
	try {
		ctx = c.getContext("2d");
	} catch(e) { return; }
	ctx.clearRect( 0,0,w,h );
	ctx.strokeStyle = "gray";
	ctx.beginPath();
	ctx.moveTo( 5, 1 );
	ctx.lineTo( w-5, 1 );
	ctx.lineTo( w-1, 5 );
	ctx.lineTo( w-1, h-5 );
	ctx.lineTo( w-5, h-1 );
	ctx.lineTo( 5, h-1 );
	ctx.lineTo( 1, h-5 );
	ctx.lineTo( 1, 5 );
	ctx.lineTo( 5, 1 );
	ctx.moveTo( 1, h - st.clientHeight - 10 );
	ctx.lineTo( w, h - st.clientHeight - 10 );
	ctx.stroke();
}

/** calculate labb **/
function calculateLabb() {
	var node = currentSelectedRow[1];
	var t = document.getElementById( "times" ).getAttribute( "value" );
	var d = document.getElementById( "distance" ).getAttribute( "value" );

	/* utblastur kg */
	var u = t * d * node.getAttribute( "co2" ) / 1000;
	document.getElementById( "co2" ).innerHTML = formatNum( u, 1 );

	/* eydsla */
	var e = t * d * node.getAttribute( "medal" ) / 100;
	document.getElementById( "fuel" ).innerHTML = formatNum( e, 1 );

	/* kostnadur - 'engine' denotes bensin or disel */
	var k = document.getElementById( node.getAttribute( "engine" ) ).getAttribute( "value" ) * e;
	document.getElementById( "saving" ).innerHTML = currency( k );

	/* kaloriur - gengid */
	var w = document.getElementById( "weight" ).getAttribute( "value" );
	var kal = t * ((( 3.785 * 3.5 * w ) / 200 ) * 12 ) * d;
	document.getElementById( "walk" ).innerHTML = formatNum( kal );

	/* kaloriur - hjolad */
	kal = t * ((( 8.059 * 3.5 * w ) / 200 ) * 3 ) * d;
	document.getElementById( "cycle" ).innerHTML = formatNum( kal );
}

/** calculate CO2 emission and binding **/
function calculateCO2() {
	var node = currentSelectedRow[1];
	/* utblastur kg */
	var u = document.getElementById( "akstur" ).getAttribute( "value" ) * node.getAttribute( "co2" ) / 1000;
	document.getElementById( "utblastur" ).innerHTML = formatNum( u, 0 );

	/* hektarar */
	var h = parseFloat(u) / 4404;
	document.getElementById( "hekt" ).innerHTML = formatNum( h, 1 );

	/* tre */
	var t = h * 2200;
	document.getElementById( "tre" ).innerHTML = formatNum( t, 0 );

}
/** private function to calc if car gets free parking **/
function isVisthaefur( node ) {
	var engine = node.getAttribute( "engine" );
	var co2 = node.getAttribute( "co2" );
	var ey = node.getAttribute( "medal" );
	var yes = false;
	if( engine == "bensin" ) {
		if( ey < 5.0 && co2 <= 120.0 ) yes = true;
	} else if ( engine == "disel" ) {
		if( ey < 4.5 && co2 <= 120.0 ) yes = true;
	} else if ( engine == "metan" ) {
		yes = true;
	} else if ( engine == "etanol" ) {
		yes = false;
	} else if ( engine == "rafmagn" ) {
		yes = true;
	}
	return yes;
}

/** calculate for comparing results **/
function calculateResult( p ) {
	var node = currentSelectedRow[p];
	if( !node ) return;
	var y = parseInt( document.getElementById( "years" ).getAttribute( "value" ) );
	document.getElementById( "ar"+p ).innerHTML = y;

	/* eydsla */
	var e = y * document.getElementById( "akstur" ).getAttribute( "value" ) * node.getAttribute( "medal" ) / 100;
	document.getElementById( "eydsla"+p ).innerHTML = formatNum( e );
	var t = "ltr";
	var v = node.getAttribute( "engine" );
	if( v == "rafmagn" )
	t = "kWh";
	else if ( v == "etanol" )
	t = "Nm<sup>3</sup>";
	document.getElementById( "eydsla_type"+p ).innerHTML = t;

	/* kostnadur - 'engine' denotes bensin or disel */
	var k = document.getElementById( node.getAttribute( "engine" ) ).getAttribute( "value" ) * e;
	document.getElementById( "kostnadur"+p ).setAttribute( "value", k );
	document.getElementById( "kostnadur"+p ).innerHTML = currency( k );

	/* utblastur */
	if( document.getElementById( "utblastur" + p )) {
		var u = y * document.getElementById( "akstur" ).getAttribute( "value" ) * node.getAttribute( "co2" ) / 1000000;
		document.getElementById( "utblastur"+p ).setAttribute( "value", u );
		document.getElementById( "utblastur"+p ).innerHTML = formatNum( u, 1 );
	}
	
	/* bifreidargjald */
	if( document.getElementById( "bifrgj" + p )) {
		var t = node.getAttribute( "kg" );
		var a = 999 - t < 0 ? 999 : t;
		var b = 999 - t < 0 ? t - 999 : 0;
		var gjald = (( a * 6.83 ) + ( b * 9.21 )) * 2 * y ;
		if( lang == "en" ) gjald = 0;
		document.getElementById( "bifrgj"+p ).setAttribute( "value", gjald );
		document.getElementById( "bifrgj"+p ).innerHTML = formatNum( gjald );
	}
	
	/* mismunur */
	var alls1 = parseInt( document.getElementById( "kostnadur1" ).getAttribute( "value" ));
	var alls2 = parseInt( document.getElementById( "kostnadur2" ).getAttribute( "value" ));
	
	if( document.getElementById( "bifrgj" + p )) {
		alls1 += parseInt( document.getElementById( "bifrgj1" ).getAttribute( "value" ));
		alls2 += parseInt( document.getElementById( "bifrgj2" ).getAttribute( "value" ));
	}
	
	// metan calc only
	if( document.getElementById( "carPrice" + p )) {
		var pr1 = document.getElementById( "carPrice1").value;
		var pr2 = document.getElementById( "carPrice2").value;
		if( pr1 != "" ) {
			pr1 = pr1.replace( /\./g, "" );
			alls1 += parseInt( pr1 );
		}
		if( pr2 != "" ) {
			pr2 = pr2.replace( /\./g, "" );
			alls2 += parseInt( pr2 );
		}
	}
	 
	var mismKostn = Math.abs( alls1 - alls2 );
	
	var k1 = 0;
	var k2 = 0;
	
	if( document.getElementById( "utblastur1" )) {
		k1 = parseFloat( document.getElementById( "utblastur1" ).innerHTML.replace( ",","." ) );
		k2 = parseFloat( document.getElementById( "utblastur2" ).innerHTML.replace( ",","." ) );
	}
	
	if( isVisthaefur( node )) {
		document.getElementById( "rvk_parking" + p ).style.display = "block";
	} else {
		document.getElementById( "rvk_parking" + p ).style.display = "none";
	}

	if( alls2 > 0 ) 
		document.getElementById( "bottom" ).className = "";
	else
		document.getElementById( "bottom" ).className = "hidden";

	var mismUtblast = Math.abs( k1 - k2 );
	//    var mismUtblast = Math.abs( document.getElementById( "utblastur1" ).getAttribute( "value" ) - document.getElementById( "utblastur2" ).getAttribute( "value" ) );

	var suffix = " kr ";
	if( lang == "en" ) suffix = " &euro;";
	document.getElementById( "diffKostn" ).innerHTML = currency( mismKostn ) + suffix;

	if( document.getElementById( "diffUtblast" )) {
		suffix = " tonn";
		if( lang == "en" ) suffix = " tons";
		document.getElementById( "diffUtblast" ).innerHTML = formatNum( mismUtblast, 1 ) + suffix;
	}
}

function calculateInnanb() {
	var node = currentSelectedRow[1];

	var d = document.getElementById( "distance" ).getAttribute( "value" );

	/* eydsla */
	var e = d * node.getAttribute( "innanb" ) / 100;

	/* kostnadur - 'engine' denotes bensin or disel */
	var k = document.getElementById( node.getAttribute( "engine" ) ).getAttribute( "value" ) * e;
	document.getElementById( "kostnadurInnanb" ).innerHTML = currency( k );

	/* utblastur */
	var u = document.getElementById( "distance" ).getAttribute( "value" ) * node.getAttribute( "co2" ) / 1000;
	document.getElementById( "utblasturInnanb" ).innerHTML = formatNum( u, 1 );
}

function calculateUtanb() {
	var node = currentSelectedRow[1];

	/* vegalengd */
	var r = theRoads[ selectedArrive ];
	var dp = selectedDepart + 1;
	var d = r[ dp ];
	document.getElementById( "distanceUtanb" ).innerHTML = formatNum( d );

	/* eydsla */
	var e = d * node.getAttribute( "utanb" ) / 100;

	/* kostnadur - 'engine' denotes bensin or disel */
	var k = document.getElementById( node.getAttribute( "engine" ) ).getAttribute( "value" ) * e;
	document.getElementById( "kostnadurUtanb" ).innerHTML = currency( k );

	/* utblastur */
	var u = d * node.getAttribute( "co2" ) / 1000;
	document.getElementById( "utblasturUtanb" ).innerHTML = formatNum( u, 1 );    
}

function tegundirChange( node, action ) {
	//    document.getElementById( node.id+"TD" ).className = "";
	removeClass( document.getElementById( node.id+"TD" ), "focus" );
	var engine = "";
	var p = node.id.substr( node.id.length - 1, 1 ); /* panel number */

	/* get the data for this tegund */
	var data = new Array();
	for( var i=0; i < this.theSubCars.length; i++ ) {
		if( theSubCars[i][10] == node.value ) {
			data.push( theSubCars[i] );
		}
	}

	/* create table and headers */
	var ths;
	if( lang=="is")
		ths = new Array( "Vél", "Skipting", "Slagrými" );
	else
		ths = new Array( "Engine", "Transm.", "Cubic cm" );
	
	/* create the header */
	var tbl = document.getElementById( "undirtegundir"+p );
	//    document.getElementById( tbl.id+"TD" ).className = "focus";
	addClass( document.getElementById( tbl.id+"TD" ), "focus" );
	removeChildren( tbl );
	var tr = document.createElement( "tr" );
	for( var i=0; i<ths.length; i++ ) {
		var th = document.createElement( "th" );
		th.innerHTML = ths[i];
		th.className = "small";
		tr.appendChild( th );
	}
	tbl.appendChild( tr );

	/* create data */
	for( var i=0; i < data.length; i++ ) {
		tr = document.createElement( "tr" );
		tr.onmouseover = mouseoverTR;
		tr.onmouseout = mouseoutTR;
		tr.onclick = action;
		tr.className = "subRow";
		tr.setAttribute( "panel", p );

		/*    
		var td = document.createElement( "td" );
		td.innerHTML = data[i][0];
		td.className = "small";
		tr.appendChild( td );
		*/

		var td = document.createElement( "td" );
		var str = data[i][1];

		var e = "engine";
		try {
			e = str.substr( 1, 1 );
		} catch (err) {
			dbug( "err:" + err );
		}
		if( e == "B" )
			engine = "bensin";
		else if( e == "D" )
			engine = "disel";
		else if( e == "H" )
			engine = "bensin";
		else if( e == "R" )
			engine = "rafmagn";
		else if( e == "E" )
			engine = "etanol";
		else if( e == "M" )
			engine = "metan";

		tr.setAttribute( "engine", engine );

		str = str.replace( "B", document.getElementById( "bensin_"+lang ).innerHTML );
		str = str.replace( "D", document.getElementById( "disel_"+lang ).innerHTML );
		str = str.replace( "H", "Hybrid" );
		str = str.replace( "E", document.getElementById( "etanol_"+lang ).innerHTML );
		str = str.replace( "M", document.getElementById( "metan_"+lang ).innerHTML );
		str = str.replace( "R", document.getElementById( "rafmagn_"+lang ).innerHTML );
		str = str.replace( "(", " " );
		str = str.replace( ")", "" );
		td.innerHTML = str;
		td.className = "small";
		tr.appendChild( td );
		
		td = document.createElement( "td" );
		str = data[i][2];
		if( str.indexOf( "B" ) > -1 )
			str = str.replace( "B", document.getElementById( "beinskiptur_"+lang ).innerHTML );
		else
			str = str.replace( "S", document.getElementById( "sjalfskiptur_"+lang ).innerHTML );
		str = str.replace( "(2)", "" );
		str = str.replace( "(3)", "" );
		str = str.replace( "(4)", "" );
		str = str.replace( "(5)", "" );
		str = str.replace( "(6)", "" );
		str = str.replace( "(7)", "" );
		td.innerHTML = str;
		td.className = "small";
		tr.appendChild( td );
		
		tr.setAttribute( "co2", data[i][3] );
		tr.setAttribute( "innanb", data[i][4] );
		tr.setAttribute( "utanb", data[i][5] );
		tr.setAttribute( "medal", data[i][6] );
		tr.setAttribute( "kg", data[i][9] );
		
		td = document.createElement( "td" );
		td.innerHTML = data[i][7] + "<small>cm<sup>3</sup></small>";
		td.className = "small";
		tr.appendChild( td );

		/*
		td = document.createElement( "td" );
		td.appendChild( document.createTextNode(  data[i][9] + "kg" ) );
		tr.appendChild( td );
		*/

		tbl.appendChild( tr );

	}

	node.blur();
}

function tegChange1() {
	tegundirChange( this, clickTR1 );
	//document.getElementById( "calc1" ).className = "hidden";
}

function tegChange2() {
	tegundirChange( this, clickTR2 );
	document.getElementById( "calcInnan" ).className = "hidden";
	document.getElementById( "calcUtan" ).className = "hidden";
}

function tegChangeCO2() {
	tegundirChange( this, clickTRCO2 );
	document.getElementById( "calcCO2" ).className = "hidden";
}

function tegChangeLabb() {
	tegundirChange( this, clickTRLabb );
	document.getElementById( "calcLabb" ).className = "hidden";
}

function tegChangeEnergyClass() {
	tegundirChange( this, clickTREnergyClass );
	document.getElementById( "calcEnergyClass" ).className = "hidden";
}

function tegChangeMetan() {

	//    document.getElementById( node.id+"TD" ).className = "";
	removeClass( document.getElementById( this.id+"TD" ), "focus" );
	var engine = "";
	var p = this.id.substr( this.id.length - 1, 1 ); /* panel number */

	/* get the data for this tegund */
	var data = new Array();
	for( var i=0; i < this.subCars.length; i++ ) {
		if( this.subCars[i][10] == this.value ) {
			data.push( this.subCars[i] );
		}
	}

	/* create table and headers */
	var ths;
	if( lang=="is")
		ths = new Array( "Vél", "Skipting", "Slagrými" );
	else
		ths = new Array( "Engine", "Transm.", "Cubic cm" );

	/* create the header */
	var tbl = document.getElementById( "undirtegundir"+p );
	//    document.getElementById( tbl.id+"TD" ).className = "focus";
	addClass( document.getElementById( tbl.id+"TD" ), "focus" );
	removeChildren( tbl );
	var tr = document.createElement( "tr" );
	for( var i=0; i<ths.length; i++ ) {
		var th = document.createElement( "th" );
		th.innerHTML = ths[i];
		th.className = "small";
		tr.appendChild( th );
	}
	tbl.appendChild( tr );

	/* create data */
	for( var i=0; i<data.length; i++ ) {
		tr = document.createElement( "tr" );
		tr.onmouseover = mouseoverTR;
		tr.onmouseout = mouseoutTR;
		tr.onclick = clickTRMetan;
		tr.className = "subRow";
		tr.setAttribute( "panel", p );

		/*    
		var td = document.createElement( "td" );
		td.innerHTML = data[i][0];
		td.className = "small";
		tr.appendChild( td );
		*/
		var td = document.createElement( "td" );

		var str = data[i][1];
		var e = str.substr( 1, 1 );
		if( e == "B" )
			engine = "bensin";
		else if( e == "D" )
			engine = "disel";
		else if( e == "H" )
			engine = "bensin";
		else if( e == "R" )
			engine = "rafmagn";
		else if( e == "E" )
			engine = "etanol";
		else if( e == "M" )
			engine = "metan";

		tr.setAttribute( "engine", engine );
		str = str.replace( "B", document.getElementById( "bensin_"+lang ).innerHTML );
		str = str.replace( "D", document.getElementById( "disel_"+lang ).innerHTML );
		str = str.replace( "H", "Hybrid" );
		str = str.replace( "E", document.getElementById( "etanol_"+lang ).innerHTML );
		str = str.replace( "M", document.getElementById( "metan_"+lang ).innerHTML );
		str = str.replace( "R", document.getElementById( "rafmagn_"+lang ).innerHTML );
		str = str.replace( "(", " " );
		str = str.replace( ")", "" );
		td.innerHTML = str;
		td.className = "small";
		tr.appendChild( td );

		td = document.createElement( "td" );
		str = data[i][2];
		if( str.indexOf( "B" ) > -1 )
		str = str.replace( "B", document.getElementById( "beinskiptur_"+lang ).innerHTML );
		else
		str = str.replace( "S", document.getElementById( "sjalfskiptur_"+lang ).innerHTML );
		str = str.replace( "(2)", "" );
		str = str.replace( "(3)", "" );
		str = str.replace( "(4)", "" );
		str = str.replace( "(5)", "" );
		str = str.replace( "(6)", "" );
		str = str.replace( "(7)", "" );
		td.innerHTML = str;
		td.className = "small";
		tr.appendChild( td );

		tr.setAttribute( "co2", data[i][3] );
		tr.setAttribute( "innanb", data[i][4] );
		tr.setAttribute( "utanb", data[i][5] );
		tr.setAttribute( "medal", data[i][6] );
		tr.setAttribute( "kg", data[i][9] );

		td = document.createElement( "td" );
		td.innerHTML = data[i][7] + "<small>cm<sup>3</sup></small>";
		td.className = "small";
		tr.appendChild( td );

		/*
		td = document.createElement( "td" );
		td.appendChild( document.createTextNode(  data[i][9] + "kg" ) );
		tr.appendChild( td );
		*/

		tbl.appendChild( tr );
	}

	this.blur();

}

function framleidendurChange( node, action ) {
	//    document.getElementById( node.id+"TD" ).className = "";
	removeClass( document.getElementById( node.id+"TD" ), "focus" );
	var val = node.value;
	var p = node.id.substr( node.id.length - 1, 1 ); /* panel number */
	msg( "&lt;"+val+"&gt;" );
	var sel = document.getElementById( "tegPopup"+p );
	sel.focus();
	//    document.getElementById( sel.id+"TD" ).className = "focus";
	addClass( document.getElementById( sel.id+"TD" ), "focus" );

	removeChildren( sel );
	sel.onchange = action;
	sel.className = "";
	var opt = document.createElement( "option" );
	opt.value = "xxx"
	opt.innerHTML = document.getElementById( "tegund_"+lang ).innerHTML;
	sel.appendChild( opt );

	for( var i=0; i<tegundir.length; i++ ) {
		var f = tegundir[ i ];
		if( f[0].indexOf( node.value ) > -1 ) {
			opt = document.createElement( "option" );
			opt.innerHTML = f[1];
			opt.value = f[2];
			sel.appendChild( opt );
		}
	}
	removeChildren( document.getElementById( "undirtegundir"+p ));
}

function frmlChange1() {
	framleidendurChange( this, tegChange1 );
	// document.getElementById( "calc1" ).className = "hidden";
}

function frmlChange2() {
	framleidendurChange( this, tegChange2 );
	document.getElementById( "calcInnan" ).className = "hidden";
	document.getElementById( "calcUtan" ).className = "hidden";
}

function frmlChangeCO2() { //kolefnisreiknir
	framleidendurChange( this, tegChangeCO2 );
}

function frmlChangeLabb() { //göngutúrareiknir
	framleidendurChange( this, tegChangeLabb );
}

function frmlChangeEnergyClass() { //energy class reiknir
	framleidendurChange( this, tegChangeEnergyClass );
	document.getElementById( "calcEnergyClass" ).className = "hidden";
}

function frmlChangeMetan() {
	//    document.getElementById( node.id+"TD" ).className = "";
	removeClass( document.getElementById( this.id+"TD" ), "focus" );
	var val = this.value;
	var p = this.id.substr( this.id.length - 1, 1 ); /* panel number */
	var sel = document.getElementById( "tegPopup"+p );
	sel.focus();
	//    document.getElementById( sel.id+"TD" ).className = "focus";
	addClass( document.getElementById( sel.id+"TD" ), "focus" );

	removeChildren( sel );
	sel.onchange = tegChangeMetan;
	sel.className = "";
	var opt = document.createElement( "option" );
	opt.value = "xxx"
	opt.innerHTML = document.getElementById( "tegund_"+lang ).innerHTML;
	sel.appendChild( opt );

	for( var i=0; i < this.tegundir.length; i++ ) {
		var f = this.tegundir[ i ];
		if( f[0].indexOf( this.value ) > -1 ) {
			opt = document.createElement( "option" );
			opt.innerHTML = f[1];
			opt.value = f[2];
			sel.appendChild( opt );
		}
	}
	sel.subCars = this.subCars;
	removeChildren( document.getElementById( "undirtegundir"+p ));
}

function installBtns( action ) {
	// if( document.images ) {
	btns[0] = new Image;
	btns[0].src = imgRoot + "btnUp1.gif";
	btns[1] = new Image;
	btns[1].src = imgRoot + "btnUp2.gif";
	btns[2] = new Image;
	btns[2].src = imgRoot + "btnDown1.gif";
	btns[3] = new Image;
	btns[3].src = imgRoot + "btnDown2.gif";
	// }

	var b = getElementsByClass( "btn" );
	for( var i=0; i<b.length; i++ ) {
		b[i].onclick = action;
		b[i].onmousedown = btnDown;
		b[i].onmouseup = btnUp;
		var img = document.createElement( "img" );
		var s = btns[ b[i].getAttribute( "btnID" ) ].src;
		img.src = s;
		b[i].appendChild( img );
	}
}

function btnDown() {
	var b = parseInt( this.getAttribute( "btnID" ) ) + 1;
	this.firstChild.src = btns[ b ].src;
}

function btnUp() {
	var b = this.getAttribute( "btnID" );
	this.firstChild.src = btns[ b ].src;
}

function doClick( btn ) {
	var t = document.getElementById( btn.getAttribute( "target" ) );
	var i = parseInt( btn.getAttribute( "inc" ) );
	var v = parseInt( t.getAttribute( "value" ) );
	var m = parseInt( t.getAttribute( "min" ) );
	v += i;
	if( v < m ) v = m;
	t.setAttribute( "value", v );
	if( t.getAttribute( "type" ) == "currency" )
	t.innerHTML = currency( v );
	else
	t.innerHTML = formatNum( v );
}

function btnClick1() {
	doClick( this );
	calculateResult( 1 );
	calculateResult( 2 );
}

function btnClick2() {
	doClick( this );
	calculateInnanb();
	calculateUtanb();
}

function btnClickCO2() {
	doClick( this );
	calculateCO2();
}

function btnClickLabb() {
	doClick( this );
	calculateLabb();
}

function btnClickGluggar() {
	doClick( this );
	calcGluggi();
}

function btnClickKlaedning() {
	doClick( this );
	calcKlaedning();
}

function btnClickEngergyClass() {
	doClick( this );
	calculateEngeryClass();
}

function changeDepart() {
	msg( "depart: " + this.value );
	selectedDepart = parseInt( this.value );
	calculateUtanb();
}

function changeArrive() {
	msg( "arrive: " + this.value );
	selectedArrive = parseInt( this.value );
	calculateUtanb();
}

function setForsendur( key, value ) {
	var target = document.getElementById( key )
	if( target != undefined ) {
		target.setAttribute( "value", value );
		for( var i=0; i<target.childNodes.length; i++ ) {
			var node = target.childNodes[ i ];
			if( node.className == "is" ) {
				node.innerHTML = value;
			} else if ( node.className = "en" ) {
				node.innerHTML = formatNum( value / 100, 2 );
			}
		}
	}
}

/** install car data
** count is number of cars ( 2 for compare, 1 for others )
** action is the function to call at onchange for selection menu
** types is for methanol comparison calculator and adds only types declared in comma separated list where B=bensin D=diesel M=methan
**/
function init1( count, action, isMetan ) {
	try { lang = document.getElementById( "currentLanguage" ).innerHTML; } catch (e) {}
	setForsendur( "bensin", priceBensin );
	setForsendur( "disel", priceDisel );
	setForsendur( "metan", priceMetan );
	var pFramleidandi, pTegund, pUndirtegund;
	var tegundID = 0;
	var theCars = document.getElementById( "cars" ).innerHTML.split( "/" );

	for( var i=0; i<theCars.length; i=i+12 ) {
		var framleidandi = trimString(theCars[i]);
		var tegund = theCars[i+1];
		var undirtegund = theCars[i+2];
		var vel = theCars[i+3];
		var skipting = theCars[i+4];
		var co2 = theCars[i+5];
		var innanb = theCars[i+6];
		if( innanb ) innanb = innanb.replace(",",".");
		var utanb = theCars[i+7];
		if( utanb ) utanb = utanb.replace(",",".");
		var medal = theCars[i+8];
		if( medal) medal = medal.replace(",", ".");
		var cm2 = theCars[i+9];
		var kw = theCars[i+10];
		var kg = theCars[i+11];
		
		var addCar = true;
		if( isMetan ) {
			var c = vel.substr(1,1);
			if( count == 1 ) {
				addCar = (c == "M");

			} else {
				addCar = (c == "B" || c == "D");

			}
			//addCar = (count == 1 && c=="M") || (count == 2 && c=="B" || c=="D");
		}

		if( addCar ) {
			if( framleidandi != pFramleidandi ) {
				framleidendur.push( framleidandi );
			}

			if( tegund != pTegund ) {
				var a = new Array();
				a.push( framleidandi );
				a.push( tegund );
				a.push( tegundID + 1 );
				tegundir.push( a );
				tegundID++;
			}

			subCars = new Array();
			subCars.push( undirtegund );
			subCars.push( vel );
			subCars.push( skipting );
			subCars.push( co2 );
			subCars.push( innanb );
			subCars.push( utanb );
			subCars.push( medal );
			subCars.push( cm2 );
			subCars.push( kw );
			subCars.push( kg );
			subCars.push( tegundID );
			theSubCars.push( subCars );
		}
		pFramleidandi = framleidandi;
		pTegund = tegund;
	}

	/* create producer's popup menu */
	for( var p=1; p < count + 1; p++ ) {
		msg( p );
		var sel = document.getElementById( "framleidendur"+p );
		var opt = document.createElement( "option" );
		opt.innerHTML = document.getElementById( "framleidandi_"+lang ).innerHTML;
		opt.setAttribute( "value", "null" );
		sel.appendChild( opt );
		sel.value = "xxx";
		sel.onchange = action;
		for( var i=0; i<framleidendur.length; i++ ) {
			opt = document.createElement( "option" );
			txt = document.createTextNode( framleidendur[i] );
			opt.value = framleidendur[i];
			opt.appendChild( txt );
			sel.appendChild( opt );
		}
	}

	msg( "ready" );
}

function init2() {

	/* install roads and distances */
	var roads = document.getElementById( "roads" );
	var d = roads.innerHTML.split( "|" ); // split header and data
	/* read columns headers */
	var c = d[0].split( "/" );
	var sel = document.getElementById( "depart" );
	sel.onchange = changeDepart;
	for ( var i=0; i < c.length; i++ ) {
		depart.push( c[i] );
		var opt = document.createElement( "option" );
		opt.value = i;
		opt.innerHTML = c[i];
		sel.appendChild( opt );
	}

	/* read roads and distances */
	var r = d[1].split( "*" );
	sel = document.getElementById( "arrive" );
	sel.onchange = changeArrive;
	for ( var i=0; i < r.length; i++ ) {
		var t = r[i].split( "/" );
		theRoads.push( t );
		var opt = document.createElement( "option" );
		opt.value = i;
		opt.innerHTML = t[0];
		sel.appendChild( opt );
	}
}

function initMetan() {
	try { lang = document.getElementById( "currentLanguage" ).innerHTML; } catch (e) {}
	setForsendur( "bensin", priceBensin );
	setForsendur( "disel", priceDisel );
	setForsendur( "metan", priceMetan );
	var pFramleidandi, pTegund, pUndirtegund;
	var theCars = document.getElementById( "cars" ).innerHTML.split( "/" );
	var p = 0;
	do {
		p++;
		var tegundID = 0;
		var sel = document.getElementById( "framleidendur"+p ); // the target popup menu
		// add first line instruction e.g. Veldu framleiðanda...
		var opt = document.createElement( "option" );
		opt.innerHTML = document.getElementById( "framleidandi_"+lang ).innerHTML; 
		opt.setAttribute( "value", "null" );
		sel.appendChild( opt );
		sel.value = "xxx";
		sel.onchange = frmlChangeMetan; 
		sel.tegundir = new Array();
		sel.subCars = new Array();
		for( var i=0; i<theCars.length; i=i+12 ) {
			try {
				var framleidandi = trimString(theCars[i]);
				var tegund = theCars[i+1];
				var undirtegund = theCars[i+2];
				var vel = theCars[i+3];
				var skipting = theCars[i+4];
				var co2 = theCars[i+5];
				var innanb = theCars[i+6];
				if( innanb ) innanb = innanb.replace(",",".");
				var utanb = theCars[i+7];
				if( utanb ) utanb = utanb.replace(",",".");
				var medal = theCars[i+8];
				if( medal) medal = medal.replace(",", ".");
				var cm2 = theCars[i+9];
				var kw = theCars[i+10];
				var kg = theCars[i+11];

				var addCar = true;
				var c = vel.substr(1,1);
				if( p == 1 ) {
					addCar = (c == "M");
				} else {
					addCar = (c == "B" || c == "D");
				}

				if( addCar ) {
					if( framleidandi != pFramleidandi ) {
						opt = document.createElement( "option" );
						var txt = document.createTextNode( framleidandi );
						opt.value = framleidandi;
						opt.appendChild( txt );
						sel.appendChild( opt );
						pFramleidandi = framleidandi;
					}

					if( tegund != pTegund ) {
						var a = new Array();
						a.push( framleidandi );
						a.push( tegund );
						a.push( tegundID + 1 );
						sel.tegundir.push( a );
						pTegund = tegund;
						tegundID++;
					}

					subCars = new Array();
					subCars.push( undirtegund );
					subCars.push( vel );
					subCars.push( skipting );
					subCars.push( co2 );
					subCars.push( innanb );
					subCars.push( utanb );
					subCars.push( medal );
					subCars.push( cm2 );
					subCars.push( kw );
					subCars.push( kg );
					subCars.push( tegundID );
					sel.subCars.push( subCars );
				}
			} catch (e) {}
		}
	} while ( p < 2 );
}

function trimString(sInString) {
	sInString = sInString.replace( /^\s+/g, "" );// strip leading
	return sInString.replace( /\s+$/g, "" );// strip trailing
}