function createHttpRequest(){
	
		if(window.ActiveXObject){
	
			try{
				return new ActiveXObject("Msxml2.XMLHTTP");
			}catch(e){
				try{
					return new ActiveXObject("Microsoft.XMLHTTP");
				}catch(e){
					return null;
				}
			}
	
		}else if(window.XMLHttpRequest){
			return new XMLHttpRequest
		}else{
			return null;
		}
	}