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Ajax get和Post的纯js实现代码,
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<span style="font-size:18px;">//AJAX类
function AjaxClass()
{
var XmlHttp = false;
try
{
XmlHttp = new XMLHttpRequest(); //FireFox专有
}
catch(e)
{
try
{
XmlHttp = new ActiveXObject("MSXML2.XMLHTTP");
}
catch(e2)
{
try
{
XmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e3)
{
alert("你的浏览器不支持XMLHTTP对象,请升级到IE6以上版本!");
XmlHttp = false;
}
}
}
var me = this;
this.Method = "POST";
this.Url = "";
this.Async = true;
this.Arg = "";
this.CallBack = function(){};
this.Loading = function(){};
this.Send = function()
{
if (this.Url=="")
{
return false;
}
if (!XmlHttp)
{
return IframePost();
}
XmlHttp.open (this.Method,this.Url,this.Async);
if (this.Method=="POST")
{
XmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
}
XmlHttp.onreadystatechange = function()
{
if (XmlHttp.readyState==4)
{
var Result = false;
if (XmlHttp.status==200)
{
Result = XmlHttp.responseText;
}
XmlHttp = null;
me.CallBack(Result);
}
else
{
me.Loading();
}
}
if (this.Method=="POST")
{
XmlHttp.send(this.Arg);
}
else
{
XmlHttp.send(null);
}
}
//Iframe方式提交
function IframePost()
{
var Num = 0;
var obj = document.createElement("iframe");
obj.attachEvent("onload",function(){ me.CallBack(obj.contentWindow.document.body.innerHTML); obj.removeNode() });
obj.attachEvent("onreadystatechange",function(){ if (Num>=5) {alert(false);obj.removeNode()} });
obj.src = me.Url;
obj.style.display = 'none';
document.body.appendChild(obj);
}
}
/*----------------------------调用方法------------------------------
var Ajax = new AjaxClass(); // 创建AJAX对象
Ajax.Method = "POST"; // 设置请求方式为POST
Ajax.Url = "default.asp" // URL为default.asp
Ajax.Async = true; // 是否异步
Ajax.Arg = "a=1&b=2"; // POST的参数
Ajax.Loading = function(){ //等待函数
document.write("loading...");
}
Ajax.CallBack = function(str) // 回调函数
{
document.write(str);
}
Ajax.Send(); // 发送请求
-----------------------------------------------------------
var Ajax = new AjaxClass(); // 创建AJAX对象
Ajax.Method = "GET"; // 设置请求方式为POST
Ajax.Url = "default.asp?a=1&b=2" // URL为default.asp
Ajax.Async = true; // 是否异步
Ajax.Loading = function(){ //等待函数
document.write("loading...");
}
Ajax.CallBack = function(str) // 回调函数
{
document.write(str);
}
Ajax.Send(); // 发送请求
--------------------------------------------------------------------*/ </span>