var xmlhttp;

function change_paypal_forms(str)
{

xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Your browser does not support XMLHTTP!");
  return;
  }
var url="index.php?main_page=get_paypal_form";
url=url+"&pay_option="+str+"&ajax=true";

//alert(url);
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function stateChanged()
{
if (xmlhttp.readyState==4)
  {
         //  alert(xmlhttp.responseText);
	  document.getElementById("payment_forms").innerHTML=xmlhttp.responseText;
         // alert(document.getElementById("payment_forms").innerHTML);
  }
}

function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}