一份老外写的XMLHttpRequest代码多浏览器支持兼容性.docVIP

一份老外写的XMLHttpRequest代码多浏览器支持兼容性 这几天要构思用Javascript调用Asp.Net的WebService，需要到XMLHTTP来支持，但发现Opera的XMLHttpRequest很烂，实在支持不下去，后来到处找，终于发现这份代码，在Opera中是利用.URL等类来实现的，不敢独享，特发上来与大家同乐。[复制此代码]CODE:/* Cross-Browser XMLHttpRequest v1.2 ================================= Emulate Gecko XMLHttpRequest() functionality in IE and Opera. Opera requires the Sun Java Runtime Environment /. by Andrew Gregory .au/family/andrew/webdesign/xmlhttprequest/ This work is licensed under the Creative Commons Attribution License. To view a copy of this license, visit /licenses/by-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA. Attribution: Leave my name and web address in this script intact. Not Supported in Opera ---------------------- * user/password authentication * responseXML data member Not Fully Supported in Opera ---------------------------- * async requests * abort() * getAllResponseHeaders(), getAllResponseHeader(header) */ // 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; ? }; } // Gecko support /* ;-) */ // 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 = conte