AJAX的问题

[jzkangta]

有如下js

function  onException(e) {
    
    return false;
}

function donothing(){}

function xmlhttp()
{
	
	var xconn, bComplete = false;
	
	this.request = function( sUrl, oReq ){
	 	
		if(window.XMLHttpRequest){
			xconn = new XMLHttpRequest();
		}
		// 支持ActiveX
		else if(window.ActiveXObject){
			try{
				xconn = new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch(e){
				xconn = new ActiveXObject("Microsoft.XMLHTTP");
			}
		}
		if (!xconn){
			 return false;
		}
		bComplete = false;
		if( !oReq.method ) oReq.method = "GET";
		oReq.method = oReq.method.toUpperCase();
		async = true;
		if( oReq.async == undefined ) async = true;
		else if( oReq.async == false || oReq.sync ==true )
			async = false;
		parameters = oReq.parameters || '';
	    if (parameters.length > 0)
	    	parameters += '&_ajax=1';
		try {
			aUrl = sUrl;
			if ( oReq.method == "GET"){
			    if (parameters.length > 0){
					aUrl += ( sUrl.match(/\?/) ? '&' : '?') + parameters;
				}
		    	parameters = "";
			}
	    	xconn.open( oReq.method, aUrl, async );
			if( async){
				xconn.onreadystatechange = function(){
					try{
						state = xconn.readyState;
						//log4.info( "state:" + state );
						(oReq.onReadyState||donothing)( xconn, oReq);
						
						if ( state == 1 && !bComplete){
							(oReq.onLoading||donothing)(xconn, oReq);
						}
						else if ( state == 2 && !bComplete){
							(oReq.onLoaded||donothing)(xconn, oReq);
						}
						else if ( state == 3 && !bComplete){
							(oReq.onInteractive||donothing)(xconn, oReq);
						}
						else if ( state == 4 && !bComplete){
							bComplete = true;
							(oReq.onComplete||donothing)(xconn, oReq);
							retstatus = xconn.status;
							if( retstatus != undefined ){
								(oReq.onStatus||donothing)( xconn, oReq);
							}
							if( retstatus == undefined || retstatus == 0 || (retstatus >= 200 && retstatus < 300) ){
								(oReq.onSuccess||donothing)(xconn, oReq);
							}
							else{
								(oReq.onFail||donothing)(xconn, oReq);
							}
						}
					}
					catch(e){
						(oReq.onException||onException)(e);
					}
				};
			}
			this.setRequestHeaders( sUrl, oReq );
			xconn.send( parameters );
			if( !async ){
			
					(oReq.onComplete||donothing)(xconn, oReq);
					retstatus = xconn.status;
					if( retstatus != "undefined" ){
						(oReq.onStatus||donothing)( xconn, oReq);
					}
					if( retstatus == undefined || retstatus == 0 || (retstatus >= 200 && retstatus < 300) ){
						(oReq.onSuccess||donothing)(xconn, oReq);
					}
					else{
						(oReq.onFail||donothing)(xconn, oReq);
					}
				
			}
		}
		catch(z) { 
			return (oReq.onException||onException)(z);
		}
		return true;
	};
	
	this.setRequestHeaders=function( sUrl, oReq ) {
		var requestHeaders = ['X-Requested-With', 'XMLHttpRequest'];
		
		
		if( oReq.method == 'POST') {
			requestHeaders.push('Content-type', 'application/x-www-form-urlencoded');
			requestHeaders.push("Method", "POST "+sUrl+" HTTP/1.1");
			if( xconn.overrideMimeType)
				requestHeaders.push('Connection', 'close');
		}
		if (oReq.requestHeaders)
			requestHeaders = requestHeaders.concat( oReq.requestHeaders);
		for (var i = 0; i < requestHeaders.length; i += 2)
			xconn.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);
	};

	this.loadJson = function( jsUrl, oReq ){
		idstr = "jsonId_"+ ( oReq.jsonId||(new Date().getTime()) );
		var elm=document.getElementById(idstr);
		if( elm && oReq.cache ){
			elm.src = jsUrl + (jsUrl.indexOf("?")>0?"&":"?") +"loadJson="+(new Date().getTime());
		}
		else{
			if( elm ){
				elm.parentNode.removeChild(elm);
			}
			elm = document.createElement("script");
			elm.id=idstr;
			document.body.appendChild(elm);
			elm.src =  jsUrl + (jsUrl.indexOf("?")>0?"&":"?") +"loadJson="+(new Date().getTime());
		}
		var repeat = 0;
		
		if( oReq.callback )
			setTimeout( function(){(oReq.callback||donothing)(oReq);} , 500 );

	};
	return this;
}

这里this.request = function( sUrl, oReq )当sUrl是webSite/webSite.js就可以正常   是http://keyword.bbapp.net:8021/webSite/webSite.js就不可以了  请问大家这是为什么  加上绝对路径是方便其他地方调用的

[jzkangta]

谢谢，现在知道原因了，ajax不支持跨域访问

[jzkangta]

顶一下

[mumu_java]

http://keyword.bbapp.net:8021/webSite/webSite.js
改成
http://127.0.0.1:8021/webSite/webSite.js
应该可以。试试。