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

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

function RoundUp() {
	var vntValue1, vntValue2;
	vntValue1 = eval(document.calc.txtHeight.value);
	vntValue2 = eval(document.calc.txtWidth.value);
	
	vntValue1 = Math.ceil(vntValue1);
	if ((vntValue1 % 2) == 1)
		vntValue1 = vntValue1 + 1;

	vntValue2 = Math.ceil(vntValue2);
	if ((vntValue2 % 2) == 1)
		vntValue2 = vntValue2 + 1;

	document.calc.txtHeight.value = vntValue1;
	document.calc.txtWidth.value = vntValue2;
}

function calcit() {
	var vntValue;
	vntValue = eval(document.calc.shownum.value);
	document.calc.shownum.value = vntValue;
	
	SetBackgroundGrid(vntValue);
}

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

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