function(Url) {   var XML = new XMLHttpRequest();   XML.onreadystatechange = function() {     if (XML.readyState == 4)     {       if (XML.status == 200)       {         //XML.responseText       }       else       {         //XML.statusText       }     }     else     {       //数据加载中...     }   };   XML.open("GET",Url);   XML.send(null); };

// IE support if (window.ActiveXObject && !window.XMLHttpRequest) {   window.XMLHttpRequest = function()     {       var msxmls = new Array('Msxml2.XMLHTTP.5.0','Msxml2.XMLHTTP.4.0','Msxml2.XMLHTTP.3.0','Msxml2.XMLHTTP','Microsoft.XMLHTTP');       for (var i = 0; i < msxmls.length; i++)       {         try         {           return new ActiveXObject(msxmls[i]);         }         catch (e)         {         }       }       return null;     }; } // Opera support if (window.opera && !window.XMLHttpRequest) {   window.XMLHttpRequest = function()   {     this.readyState = 0; // 0=uninitialized,1=loading,2=loaded,3=interactive,4=complete     this.status = 0; // HTTP status codes     this.statusText = '';     this._headers = [];     this._aborted = false;     this._async = true;     this._defaultCharset = 'ISO-8859-1';     this._getCharset = function()     {       var charset = _defaultCharset;       var contentType = this.getResponseHeader('Content-type').toUpperCase();       val = contentType.indexOf('CHARSET=');       if (val != -1)       {         charset = contentType.substring(val);       }       val = charset.indexOf(';');       if (val != -1)       {         charset = charset.substring(0, val);       }       val = charset.indexOf(',');       if (val != -1)       {         charset = charset.substring(0, val);       }       return charset;     };     this.abort = function()     {       this._aborted = true;     };     this.getAllResponseHeaders = function()     {       return this.getAllResponseHeader('*');     };     this.getAllResponseHeader = function(header)     {       var ret = '';       for (var i = 0; i < this._headers.length; i++)       {         if (header == '*' || this._headers[i].h == header)         {           ret += this._headers[i].h + ': ' + this._headers[i].v + '\n';         }       }       return ret;     };     this.getResponseHeader = function(header)     {       var ret = getAllResponseHeader(header);       var i = ret.indexOf('\n');       if (i != -1)       {         ret = ret.substring(0, i);       }       return ret;     };     this.setRequestHeader = function(header, value)     {       this._headers[this._headers.length] = {h:header, v:value};     };     this.open = function(method, url, async, user, password)     {       this.method = method;       this.url = url;       this._async = true;       this._aborted = false;       this._headers = [];       if (arguments.length >= 3)       {         this._async = async;       }       if (arguments.length > 3)       {         opera.postError('XMLHttpRequest.open() - user/password not supported');       }       this.readyState = 1;       if (this.onreadystatechange)       {         this.onreadystatechange();       }     };     this.send = function(data)     {       if (!navigator.javaEnabled())       {         alert("XMLHttpRequest.send() - Java must be installed and enabled.");         return;       }       if (this._async)       {         setTimeout(this._sendasync, 0, this, data);       }       else       {         this._sendsync(data);       }     };     this._sendasync = function(req, data)     {       if (!req._aborted)       {         req._sendsync(data);       }     };     this._sendsync = function(data)     {       this.readyState = 2;       if (this.onreadystatechange)       {         this.onreadystatechange();       }       var url = new java.net.URL(new java.net.URL(window.location.href), this.url);       var conn = url.openConnection();       for (var i = 0; i < this._headers.length; i++)       {         conn.setRequestProperty(this._headers[i].h, this._headers[i].v);       }       this._headers = [];       if (this.method == 'POST')       {       // POST data         conn.setDoOutput(true);         var wr = new java.io.OutputStreamWriter(conn.getOutputStream(), this._getCharset());         wr.write(data);         wr.flush();         wr.close();       }       // read response headers       // NOTE: the getHeaderField() methods always return nulls for me :(       var gotContentEncoding = false;       var gotContentLength = false;       var gotContentType = false;       var gotDate = false;       var gotExpiration = false;       var gotLastModified = false;       for (var i = 0; ; i++)       {         var hdrName = conn.getHeaderFieldKey(i);         var hdrValue = conn.getHeaderField(i);         if (hdrName == null && hdrValue == null)         {           break;         }         if (hdrName != null)         {           this._headers[this._headers.length] = {h:hdrName, v:hdrValue};           switch (hdrName.toLowerCase())           {             case 'content-encoding': gotContentEncoding = true; break;             case 'content-length' : gotContentLength = true; break;             case 'content-type' : gotContentType = true; break;             case 'date' : gotDate = true; break;             case 'expires' : gotExpiration = true; break;             case 'last-modified' : gotLastModified = true; break;           }         }       }       // try to fill in any missing header information       var val;       val = conn.getContentEncoding();       if (val != null && !gotContentEncoding) this._headers[this._headers.length] = {h:'Content-encoding', v:val};       val = conn.getContentLength();       if (val != -1 && !gotContentLength) this._headers[this._headers.length] = {h:'Content-length', v:val};       val = conn.getContentType();       if (val != null && !gotContentType) this._headers[this._headers.length] = {h:'Content-type', v:val};       val = conn.getDate();       if (val != 0 && !gotDate) this._headers[this._headers.length] = {h:'Date', v:(new Date(val)).toUTCString()};       val = conn.getExpiration();       if (val != 0 && !gotExpiration) this._headers[this._headers.length] = {h:'Expires', v:(new Date(val)).toUTCString()};       val = conn.getLastModified();       if (val != 0 && !gotLastModified) this._headers[this._headers.length] = {h:'Last-modified', v:(new Date(val)).toUTCString()};       // read response data       var reqdata = '';       var stream = conn.getInputStream();       if (stream)       {         var reader = new java.io.BufferedReader(new java.io.InputStreamReader(stream, this._getCharset()));         var line;         while ((line = reader.readLine()) != null)         {           if (this.readyState == 2)           {             this.readyState = 3;             if (this.onreadystatechange)             {               this.onreadystatechange();             }           }           reqdata += line + '\n';         }         reader.close();         this.status = 200;         this.statusText = 'OK';         this.responseText = reqdata;         this.readyState = 4;         if (this.onreadystatechange)         {           this.onreadystatechange();         }         if (this.onload)         {           this.onload();         }       }       else       {         // error         this.status = 404;         this.statusText = 'Not Found';         this.responseText = '';         this.readyState = 4;         if (this.onreadystatechange)         {           this.onreadystatechange();         }         if (this.onerror)         {           this.onerror();         }       }     };   }; } // ActiveXObject emulation if (!window.ActiveXObject && window.XMLHttpRequest) {   window.ActiveXObject = function(type)   {     switch (type.toLowerCase())     {       case 'microsoft.xmlhttp':         case 'msxml2.xmlhttp':         case 'msxml2.xmlhttp.3.0':         case 'msxml2.xmlhttp.4.0':         case 'msxml2.xmlhttp.5.0':         return new XMLHttpRequest();     }     return null;   }; }