// JavaScript Document
var http_request = null;
var http_responseXML = null;
var http_responseTEXT = "";

//初始化、指定处理函数、发送请求的函数
function send_request(url, send)
{
	http_request = false;
	//开始初始化XMLHttpRequest 对象
	if(window.XMLHttpRequest)//Mozilla 浏览器
	{
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) http_request.overrideMimeType("text/xml");//设置MiME 类别
	}
	else if (window.ActiveXObject)// IE 浏览器
	{
		try
		{
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e)
			{
			}
		}
	}
	if (!http_request)// 异常，创建对象实例失败
	{
		window.alert("您的网页浏览器不支持ajax，部分功能无法使用。");
		return false;
	}
	http_request.onreadystatechange = processRequest;
	// 确定发送请求的方式和URL 以及是否同步执行下段代码
	if (send.length == 0)
	{
		http_request.open("GET", url, true);
		http_request.setRequestHeader("If-Modified-Since","0");
		http_request.send(null);
	}
	else
	{
		http_request.open("POST", url, true);
		http_request.setRequestHeader("If-Modified-Since","0");
		http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=UTF-8");
		http_request.send(encodeURI(send));
	}
}