function GetXMLHTTP(){
	var xmlHttp;
	try{    		// Firefox, Opera 8.0+, Safari    
		xmlHttp = new XMLHttpRequest();
	}
	catch (e){    	// Internet Explorer    
		try{      
			xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");    
		}
	    catch (e){
			try{
				xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
			}
      		catch (e){
				xmlHTTP = null;        
			}      
		}    
	}
	return xmlHttp;
}