var xmlHttp

function showCD(str)
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 } 
var url="../pay/curency.php"
url=url+"?cur="+str
url=url+"&stat=1"
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChanged() 
{ 
 if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtHint").innerHTML=xmlHttp.responseText 
 } 
}

function GetXmlHttpObject()
{
var xmlHttp=null;

if (window.XMLHttpRequest){

          // If IE7, Mozilla, Safari, etc: Use native object
          var xmlHttp = new XMLHttpRequest()

}
else
{
if (window.ActiveXObject){

          // ...otherwise, use the ActiveX control for IE5.x and IE6
          var xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
          }

}
return xmlHttp;
}