function GetxmlHTTP()
{
         var XmlHttp;        
         //Creating object of XMLHTTP in IE
         try
         {
             XmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
         }
         catch(e)
         {
          try
          {
             XmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
          } 
          catch(oc)
          {         
             XmlHttp = null;
          }
         }
         //Creating object of XMLHTTP in Mozilla and Safari 
         if(!XmlHttp && typeof XMLHttpRequest != "undefined") 
         {                
             XmlHttp = new XMLHttpRequest();
         }
         
         return XmlHttp;
}