ajax方法

var serviceUrl = "/UserAction.aspx"
function GetCookie (name){
    var arg = name + "=";
    var alen = arg.length;
    var clen = document.cookie.length;
    var i = 0;
    while (i < clen) {
        var j = i + alen;
        if (document.cookie.substring(i, j) == arg)
        return getCookieVal (j);
        i = document.cookie.indexOf(" ", i) + 1;
        if (i == 0) break;
    };
    return null;
};
function getCookieVal (offset){
    var endstr = document.cookie.indexOf (";", offset);
    if (endstr == -1)
    endstr = document.cookie.length;
    return unescape(document.cookie.substring(offset, endstr));
};
function SetCookie (name, value){
    var argv = SetCookie.arguments;
    var argc = SetCookie.arguments.length;
    var expires = (argc > 2) ? argv[2] : null;
    var path = (argc > 3) ? argv[3] : null;
    var domain = (argc > 4) ? argv[4] : null;
    var secure = (argc > 5) ? argv[5] : false;
    document.cookie = name + "=" + escape (value) +
    ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
    ((path == null) ? "" : ("; path=" + path)) +
    ((domain == null) ? "" : ("; domain=" + domain)) +
    ((secure == true) ? "; secure" : "");
};
function _UtilAjax(){
    this.xml=false;
    this.GetXmlHttp=function(){
    try {this.xml = new ActiveXObject("Msxml2.XMLHTTP");} catch (e) {
            try { this.xml = new ActiveXObject("Microsoft.XMLHTTP");}
            catch (e2) { this.xml = false;};
        };
        if (!this.xml && typeof XMLHttpRequest != 'undefined') this.xml = new XMLHttpRequest();
    };
 this.GetXmlHttp();
 var xmlHttp = this.xml;
 var ajax=this;
 var callBack=null;
 this.updatePage=function() {
        if (xmlHttp.readyState == 4) {
            var result=xmlHttp.responseText;
          if(result=="" || result==null) result="{}";
          try{
                var response = eval('('+result+')');
             if(callBack!=null && typeof callBack == "function") callBack(response);
         }catch(e){};
     };
    };
    this.toQueryString=function(json){
        var query="";
        if(json!=null)  for(var param in json)  query+=param+"="+escape(json[param])+"&";
        return query;
    };
    this.invoke=function(url,opName,params,pageCallBack,method){
        if(xmlHttp){
           var query="";
           query+=this.toQueryString(params);
           uery=query.substring(0,query.length-1);
           callBack= pageCallBack;
           if(url != null && url.length > 0){
                if(method!=null && method.toUpperCase()=="GET"){
                    url += "?opName="+opName;
                    if(query != null && query.length > 0)   url += "&"+query;
                    xmlHttp.onreadystatechange = ajax.updatePage;
                    xmlHttp.open("GET", url, true);
                    xmlHttp.setRequestHeader("CMFUAJAX-Ver","ver1.0");
                    xmlHttp.send(null);
                  }else{
                    if(opName!=null)    url += "?opName="+opName;
                    xmlHttp.onreadystatechange =ajax.updatePage;
                    xmlHttp.open("POST", url, true);
                    xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
                    xmlHttp.setRequestHeader("CMFUAJAX-Ver","ver1.0");
                    xmlHttp.send(query);
                 };
     };};};
};

 

 

 

try{  var myAjax = new _UtilAjax();  myAjax.invoke(serviceUrl,"gid24",{},null,"POST");  }catch(e){};