自己写的一个ajax代码

	var rt;
	var http;
	
	function send(page)
	{
	//	alert("sfdasdf");
		 http = createRequestObject();
		http.open('get',page,true);
		http.onreadystatechange=handleResponse;
		http.send(null);	
	}
	
	function createRequestObject()
	{
		var ro;
		var browser=navigator.appName;
		if(browser=="Microsoft Internet Explorer"){   //IE浏览器
			ro=new ActiveXObject("Microsoft.XMLHTTP");
			
		
		}
		else{
			ro=new XMLHttpRequest();  //火狐浏览器
		}
		return ro;
	}
	
	
	function handleResponse()
	{

		if(http.readyState==4)
		{
			var res=http.responseText;

			rt = res;
			response(rt);
			
		}
	}

 

 

rt为返回内容

send请求的网页

 

response(var p)必须在要使用ajax网页中定义

 

封装代码:

 

Ajax = function(callBack, method, asnyc) {
	var rt = null;
	var http = null;
	var m = method;
	var an = asnyc;
	if (typeof (callBack) != 'function') {
		alert("第1个参数不是一个方法!!");
		return;
	}
	if (m != 'post' && m != 'get') {
		alert("第2个参数错误!");
		return;
	}
	if (asnyc != false && asnyc != true) {
		alert("第3个参数错误!");
		return;
	}
	this.send = function(url) {
		http.open(m, url, an);
		http.onreadystatechange = this.handleResponse;
		http.send(null);
	}
	this.createRequestObject = function() {
		var ro;
		var browser = navigator.appName;
		if (browser == "Microsoft Internet Explorer") { // IE浏览器
			ro = new ActiveXObject("Microsoft.XMLHTTP");

		} else {
			ro = new XMLHttpRequest(); // 火狐浏览器
		}
		return ro;
	}
	this.handleResponse = function() {
		if (http.readyState == 4) {
			var res = http.responseText;
			rt = res;
			callBack(rt);
		}
	}
	http = this.createRequestObject();
}

 

使用方法:

 

//定义回调方法
function call(e){
alert(e);
}

var ajax = new Ajax(call,"post",false);
//成功后执行call方法,
// 以'post'方式传送
//同步

ajax.send("epc/inst/tq/queryCond.do?action=delete&tgId="+tgId);