function GetXmlHttpObject(handler)
{ 
   var objXMLHttp=null;
   if (window.XMLHttpRequest)
   {
	   objXMLHttp=new XMLHttpRequest();
   }
   else if (window.ActiveXObject)
   {
	  objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
   }
   return objXMLHttp;
}
function emptyField(recField){
	var theField = document.all(recField);
	theField.value = "";
}