(function(){})(

    window.EventUtil={

        addHandler:function(element,type,handler){

           // alert(1);

            if(element)

            {

                //alert(2);

                if(element.addEventListener)

                {

                   // alert(3);

                    element.addEventListener(type,handler,false);

                }else if(element.attachEvent)

                {

                   // alert(4);

                    element.attachEvent("on"+type,handler);

                }else{

                   // alert(5);

                    element["on"+type]=handler;

                }

            }

        },

        removeHandler:function(element,type,handler){

            if(element)

            {

                if(element.removeEventListener){

                    element.removeEventListener(type,handler,false);

                }else if(element.detachEvent){

                    element.detachEvent("on"+type,handler);

                }else{

                    element["on"+type]=null;

                }

            }

        },

        addReady: function(fn){

            if(document.addEventListener){//兼容非IE

                document.addEventListener("DOMContentLoaded",function(){

                    //注销事件，避免反复触发

                    document.removeEventListener("DOMContentLoaded",arguments.callee,false);

                    fn();//调用参数函数

                },false);

            }else if(document.attachEvent){//兼容IE

                IEContentLoaded (window, fn);

            }

            function IEContentLoaded (w, fn) {

                var d = w.document, done = false,

                // only fire once

                    init = function () {

                        if (!done) {

                            done = true;

                            fn();

                        }

                    };

                // polling for no errors

                (function () {

                    try {

                        // throws errors until after ondocumentready

                        d.documentElement.doScroll('left');

                    } catch (e) {

                        setTimeout(arguments.callee, 50);

                        return;

                    }

                    // no errors, fire

                    init();

                })();

                // trying to always fire before onload

                d.onreadystatechange = function() {

                    if (d.readyState == 'complete') {

                        d.onreadystatechange = null;

                        init();

                    }

                };

            }

        },

        getEvent:function(event){

            return event?window.event:event;

        },

        getEventTarget:function(event){

            return event.target||event.srcElement;

        },

        preventDefault:function(event){

            if(event.preventDefault){

                event.preventDefault();

            }else{

                event.returnValue=false;

            }

        },

        stopPropagation:function(event){

            if(event.stopPropagation){

                event.stopPropagation();

            }

            else{

                event.cancelBubble=true;

            }

        },

        ajax:(function (){

            function request (url,opt){

            function createXHR(){

                if(typeof XMLHttpRequest != "undefined"){

                    createXHR = function(){

                        return new XMLHttpRequest();

                    };

                }else if(typeof ActiveXObject != "undefined"){

                    createXHR = function(){

                        if(typeof arguments.callee.activeXString != "string"){

                            var versions = ["MSXML2.XMLHttp.6.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp"];

                            for(var i = 0, len = versions.length; i < len; i++){

                                try{

                                    var xhr = new ActiveXObject(version[i]);

                                    arguments.callee.activeXString = version[i];

                                    return xhr;

                                }catch(ex){

//skip

                                }

                            }

                        }

                        return new ActiveXObject(arguments.callee.activeXString);

                    };

                }else{

                    createXHR = function(){

                        throw new Error("No XHR Object available.");

                    };

                }

                return createXHR();

            }

            function fn(){}

            var async=opt.async!==false,

                method=opt.method||"Get",

                data=opt.data||null,

                success=opt.success||fn,

                failure=opt.failure||fn;

                method=method.toLocaleLowerCase();

            if(method=="get"&&data){

                url+=(url.indexOf('?')==-1?'?':'&')+data;

            }

            var xhr=createXHR();

            xhr.onreadystatechange=function(){

                _onStateChange(xhr,success,failure);

            }

            if(method=="post"){

                xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded;');

            }

            xhr.open(method,url,async);

            xhr.send(data);

            return xhr;

        }

            function _onStateChange(xhr,success,failure){

                if(xhr.readyState == 4){

                    var s = xhr.status;

                    if(s>= 200 && s < 300){

                        success(xhr);

                    }else{

                        failure(xhr);

                    }

                }else{}

            }

            return {request:request}

        })()

        }

);