Web/Admin/javascript/ajaxCheck.js

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var net = new Object();

//请求状态属性
net.READY_STATE_UNINITIALIZED = 0;    //未初始化
net.READY_STATE_LOADING = 1;          //正在加载
net.READY_STATE_LOADED = 2;           //已加载
net.READY_STATE_INTERACTIVE = 3;      //交互中
net.READY_STATE_COMPLETE = 4;         //完成

net.ContentLoader = function(url, params, method, onload, onerror) 
{
    this.req = null;
    this.onload = onload;
    this.onerror = (onerror) ? onerror : this.defaultError;
    this.loadXMLDoc(url, method, params);
}

net.ContentLoader.prototype.loadXMLDoc = function(url, method, params) 
{
    if (!method) 
    {
        method = "GET";
    }
    if (method == "POST") 
    {
        contentType = 'application/x-www-form-urlencoded;charset=gb2312';
    }
    if (window.XMLHttpRequest) 
    {
        this.req = new XMLHttpRequest();
    }
    else if (window.ActiveXObject) 
    {
        try 
        {
            this.req = new ActiveXObject('MSXML2.XMLHTTP');
        }
        catch (e) 
        {
            try 
            {
                this.req = new ActiveXObject('Microsoft.XMLHTTP');
            }
            catch (e) 
            {
                this.onerror.call(this);
            }
        }
    }
    if (this.req) 
    {
        try 
        {
            var loader = this;
            this.req.onreadystatechange = function() 
            {
                loader.onReadyState.call(loader);
            }
            this.req.open(method, url, true);
            if (contentType)