function geturl()
{
var getstr = "";
var count=0;
for(i=0; i<document.formX.elements.length; i++)
{
var OptElementName = document.formX.elements[i].name.substring(8,0);

if (OptElementName == "optgroup")
{
if((document.formX.elements[i].checked==true))
{
	url=(document.formX.elements[i].value);
	count=count+1;
}


}
}
if(count>1)
alert('Please select only one option to proceed');
else if(count==0)
alert('Please select an option to proceed');
else if(document.formX.agreement.checked==false)
 alert('please check "License Agreement" to proceed');
else if(count==1)
  {
  if(url=="small")
 window.location.href="https://secure.avangate.com/order/checkout.php?PRODS=3293322&QTY=1";
 else if(url=="medium")
 window.location.href="https://secure.avangate.com/order/checkout.php?PRODS=3293917&QTY=1";
 else if(url=="large")
 window.location.href="https://secure.avangate.com/order/checkout.php?PRODS=3293936&QTY=1";
}


}