function popup1(mylink, windowname)
	{
	if (! window.focus)return true;
	var href;
	if (typeof(mylink) == 'string')
	   href=mylink;
	else
	   href=mylink.href;
	window.open(href, windowname, 'width=450,height=250,scrollbars=no');
	return false;
}

function popup2(mylink, windowname)
	{
	if (! window.focus)return true;
	var href;
	if (typeof(mylink) == 'string')
	   href=mylink;
	else
	   href=mylink.href;
	window.open(href, windowname, 'width=450,height=450,scrollbars=no');
	return false;
}

function popup3(mylink, windowname)
	{
	if (! window.focus)return true;
	var href;
	if (typeof(mylink) == 'string')
	   href=mylink;
	else
	   href=mylink.href;
	window.open(href, windowname, 'width=650,height=510,scrollbars=no');
	return false;
}

function popup4(mylink, windowname)
	{
	if (! window.focus)return true;
	var href;
	if (typeof(mylink) == 'string')
	   href=mylink;
	else
	   href=mylink.href;
	window.open(href, windowname, 'width=650,height=470,scrollbars=no');
	return false;
}

function UpdateCost() {
var sum = 0;
var qty,
prc;
for (i=1; i<4; i++) {
qty = 'qty'+i;
prc = 'price'+i;
if
(document.getElementById(qty).checked == true)
{
sum += Number(document.getElementById(prc).value);
}
}
document.getElementById('totalcost').value = sum.toFixed(2);
}



function validate(form) { 
  if (!document.myForm1.qty2.checked && !document.myForm1.qty3.checked){ alert("Please select warranty"); return false;}
return true;
}