/*
2009-1-13 19:18:24
×÷Õß:ÐìµÃ½¨ qq:411828358
*/
function Ajax()
{
	var xmlhttp_request=null;
	try{
		if( window.ActiveXObject ){
			for( var i = 5; i; i-- ){
				try{
					if( i == 2 ){
						xmlhttp_request = new ActiveXObject( "Microsoft.XMLHTTP" );
					}
					else{
						xmlhttp_request = new ActiveXObject( "Msxml2.XMLHTTP." + i + ".0" );
						xmlhttp_request.setRequestHeader("Content-Type","text/xml");
						xmlhttp_request.setRequestHeader("Charset","gb2312");
					}
					break;
				}
				catch(e){
					xmlhttp_request = false;
				}
			}
		}
		else if( window.XMLHttpRequest ){
			xmlhttp_request = new XMLHttpRequest();
			if (xmlhttp_request.overrideMimeType){
				xmlhttp_request.overrideMimeType('text/xml');
			}
		}
	}catch(e){
		xmlhttp_request = false;
	}
	return xmlhttp_request;
}