function makeArray(n) {
   this.length=n
   return this
}
condTrade=new makeArray(12)
condTrade[0]="1/2 in."
condTrade[1]="3/4 in."
condTrade[2]="1 in."
condTrade[3]="1 1/4 in."
condTrade[4]="1 1/2 in."
condTrade[5]="2 in."
condTrade[6]="2 1/2 in."
condTrade[7]="3 in."
condTrade[8]="3 1/2 in."
condTrade[9]="4 in."
condTrade[10]="5 in."
condTrade[11]="6 in."

condArea=new makeArray(12)
condArea[0]=0.284
condArea[1]=0.507
condArea[2]=0.831
condArea[3]=1.452
condArea[4]=1.985
condArea[5]=3.290
condArea[6]=4.695
condArea[7]=7.267
condArea[8]=9.736
condArea[9]=12.553
condArea[10]=19.760
condArea[11]=28.567

function calcConduit(indConduit) {
	var exCount=document.forms[0].numCables.value;
	var cables = parseFloat(exCount) + 1;
	document.forms[0].numCables.value=cables;

	var exArea=document.forms[0].areaCables.value;
	var addSize=document.forms[0].Cables[indConduit].value;
	var cableArea= parseFloat(exArea)+parseFloat(addSize); 

	document.forms[0].areaCables.value=cableArea

	if (cables == 1) {
	minArea = cableArea/0.53;
	document.forms[0].allowedFill.value="53%";
	}
	
	if (cables == 2) minArea = cableArea/0.31;
	if (cables == 2) document.forms[0].allowedFill.value="31%";

	if (cables > 2)	minArea = cableArea/0.4;
	if (cables > 2)	document.forms[0].allowedFill.value="40%";

	i=0;
	while (condArea[i] < minArea){
	i=i+1;
	}
	document.forms[0].condFill.value=100*cableArea/condArea[i];
	return condTrade[i];
}

function addCable(indCable) {
	var exCond=document.forms[0].Conduit.value;
	var newCable=document.forms[0].Cables[indCable].text;
	var newCond=exCond + newCable + "\n";
	return newCond;
}