// JavaScript Document
	function gethttp_request (){
		http_request=false;
		if (window.XMLHttpRequest){
			http_request=new XMLHttpRequest();
			if (http_request.overridemimeType){
				http_request.overridemimeType('type/xml');
			}
		} else if (window.ActiveXObject){
			try{
				http_request=new ActiveXObject("Msxml2.XMLHTTP");
			}catch(e){
				try{
					http_request=new ActiveXObject("MICROSOFT.XMLHTTP");
				}catch(e){}
			}
		}
		if (!http_request){
			alert("can not create an xmlhttp instance");
			return false;
		} else {
			return true;
		}
	}

	var http_request;