//-- JavaScript code written by Alan Simpson - www.coolnerds.com
var blnSetGridItem = false;

function pad(anystr) {
	document.calc.shownum.value += anystr;
}

function formatValue(vntValue) {
	var i;
	
	if (vntValue <= 0) {
		document.calc.shownum.value = "The total is $0.00";
	} else {
		document.calc.shownum.value = "The total is $" + vntValue;
	}
}

function RoundUp() {
	var vntValue1, vntValue2;
	vntValue1 = eval(document.calc.txtHeight.value);
	vntValue2 = eval(document.calc.txtWidth.value);
	
	document.calc.txtHeight.value = Math.ceil(vntValue1);
	document.calc.txtWidth.value = Math.ceil(vntValue2);
}

function calcit() {
	var vntValue1, vntValue2, vntValue3;
	vntValue1 = eval(document.calc.txtHeight.value);
	vntValue2 = eval(document.calc.txtWidth.value);
	
	document.calc.txtHeight.value = Math.ceil(vntValue1);
	document.calc.txtWidth.value = Math.ceil(vntValue2);

	vntValue3 = ((Math.ceil(vntValue1) * Math.ceil(vntValue2)) * .8)
	formatValue(vntValue3);
}

function clearit() {
	document.calc.shownum.value = "";
}

function backspace() {
	curvalue = document.calc.shownum.value;
	curlength = curvalue.length;
	curvalue = curvalue.substring(0,curlength-1);
	document.calc.shownum.value = curvalue;
}