var productxmlHttp

function productValidate(str)
{
	productxmlHttp=GetXmlHttpObject()
	if (productxmlHttp==null)
		  {
		  alert ("Browser does not support HTTP Request")
		  return
		  } 
	var url="productvalidate.php"
	url=url+"?action="+str
	url=url+"&sid="+Math.random()
	productxmlHttp.onreadystatechange=productstateChanged 
	productxmlHttp.open("GET",url,true)
	productxmlHttp.send(null)
    
} 

function productstateChanged() 
{ 
	if (productxmlHttp.readyState==4 || productxmlHttp.readyState=="complete")
		 { 
		 document.getElementById("left").innerHTML=productxmlHttp.responseText 
		 } 
	}
    
function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
	 {
	   // Firefox, Opera 8.0+, Safari
    	   xmlHttp=new XMLHttpRequest();
	 }
	catch (e)
	 {
	 // Internet Explorer
		 try
		  {
		  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		  }
		 catch (e)
		  {	
		  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		  }
	 }
return xmlHttp;
}