function currency(anynum)
		{
		//-- Returns passed number as string in $xxx,xxx.xx format.
		anynum=eval(anynum)
		workNum=Math.abs((Math.round(anynum*100)/100));workStr=""+workNum
		if (workStr.indexOf(".")==-1){workStr+=".00"}
		dStr=workStr.substr(0,workStr.indexOf("."));dNum=dStr-0
		pStr=workStr.substr(workStr.indexOf("."))
		while (pStr.length<3){pStr+="0"}

		//--- Adds comma in thousands place.
		if (dNum>=1000) {
		  dLen=dStr.length
		  dStr=parseInt(""+(dNum/1000))+","+dStr.substring(dLen-3,dLen)
		}

		//-- Adds comma in millions place.
		if (dNum>=1000000) {
		  dLen=dStr.length
		  dStr=parseInt(""+(dNum/1000000))+","+dStr.substring(dLen-7,dLen)
		}
		retval = dStr + pStr
		//-- Put numbers in parentheses if negative.
		if (anynum<0) {retval="("+retval+")"}
		return retval
	}
	
function showExtraCost(cost)
	{
	document.writeln('<br>');
	document.writeln('Extra Cost: $'+ currency(cost));
	}