function httpost(url){
	var httpRequest = GetHttpRequest();
	httpRequest.onreadystatechange = function()
	{
		//if(httpRequest.readyState == 1)// 开始加载
		//{
			//alert("数据载入中...");
		//}
		if(httpRequest.readyState == 4)	// 调用完毕
		{
			if(httpRequest.status == 200) // 加载成功
			{
				var xmldoc = httpRequest.responseXML;
				return alert(xmldoc);
				/*var listItems = xmldoc.getElementsByTagName("listItem");
				var showMenuNeeded = false;
				menuItemArray = new Array();
				for(var i=0; i<listItems.length; i++)
				{
					showMenuNeeded = true;
					var text = listItems[i].attributes[0].value;
					menuItemArray[menuItemArray.length] = text; // read a menu item
				}
				if(showMenuNeeded){
					SB_RebuildMenu(ctrlID);
					SB_ShowMenu(ctrlID, true);
				}
				else{
					SB_ShowMenu(ctrlID, false);
				}*/
			}
			else{
				alert("请求数据失败...");
			}
		}
	}
	httpRequest.open("get", url, true);
	httpRequest.send(null);
}

function GetHttpRequest(){
	var httpRequest;
	if (window.XMLHttpRequest){ // Mozilla, Safari,...
		httpRequest = new XMLHttpRequest();
		if (httpRequest.overrideMimeType){
			httpRequest.overrideMimeType('text/xml');
		}
	}
	else if (window.ActiveXObject){ // IE
		try{
			httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(e){
			try {
				httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch(e){
				
				}
		}
	}
	return httpRequest;
}