提示：您可以先修改部分代碼再運行
<script>function HttpRequest(){if(this==window)throw new Error(0,"HttpRequest is unable to call as a function.")var me=this; var asyncFlag=false; var typeFlag=false;var r;function onreadystatechange(){if(me.onreadystatechange)me.onreadystatechange.call(r);if(r.readyState==4){if(Number(r.status)>=300){if(me.onerror)me.onerror.call(r,new Error(0,"Http error:"+r.status+" "+r.statusText));if(typeFlag)r.onreadystatechange=Function.prototype;else r.onReadyStateChange=Function.prototype;r=null;return;}me.status=r.status;me.statusText=r.statusText;me.responseText=r.responseText;me.responseBody=r.responseBody;me.responseXML=r.responseXML;me.readyState=r.readyState;if(typeFlag)r.onreadystatechange=Function.prototype;else r.onReadyStateChange=Function.prototype;r=null;if(me.onfinish)me.onfinish();}}function creatHttpRequest(){var e;try{r=new window.XMLHttpRequest();typeFlag=true;} catch(e) {var ActiveXName=['MSXML2.XMLHttp.6.0','MSXML2.XMLHttp.3.0','MSXML2.XMLHttp.5.0','MSXML2.XMLHttp.4.0','Msxml2.XMLHTTP','MSXML.XMLHttp','Microsoft.XMLHTTP']function XMLHttpActiveX(){var e;for(var i=0;i<ActiveXName.length;i++){try{var ret=new ActiveXObject(ActiveXName[i]);typeFlag=false;} catch(e) {continue;}return ret;}throw {"message":"XMLHttp ActiveX Unsurported."};}try{r=new XMLHttpActiveX();typeFlag=false;} catch(e) {throw new Error(0,"XMLHttpRequest Unsurported.");}}}creatHttpRequest();this.abort=function(){r.abort();}this.getAllResponseHeaders=function(){r.getAllResponseHeaders();}this.getResponseHeader=function(Header){r.getResponseHeader(bstrHeader);}this.open=function(Method,Url,Async,User,Password){asyncFlag=Async;try{r.open(Method,Url,Async,User,Password);} catch(e) {if(me.onerror)me.onerror(e);else throw e;}}this.send=function(Body){try{if(typeFlag)r.onreadystatechange=onreadystatechange;else r.onReadyStateChange=onreadystatechange;r.send(Body);//alert("sended");if(!asyncFlag){this.status=r.status;this.statusText=r.statusText;this.responseText=r.responseText;this.responseBody=r.responseBody;this.responseXML=r.responseXML;this.readyState=r.readyState;if(typeFlag)r.onreadystatechange=Function.prototype;else r.onReadyStateChange=Function.prototype;r=null;}} catch(e) {if(me.onerror)me.onerror(e);else throw e;}//alert("sended");}this.setRequestHeader=function(Name,Value){r.setRequestHeader(Name,Value);}}window.onload=function(){var request=new HttpRequest();request.onfinish=function(){alert(this.responseText);}request.onerror=function(e){alert(e.message);}request.open("get","http://bbs./",true);request.send(null);}</script>
提示：您可以先修改部分代碼再運行
