/* -> 此实现在FF下按F5有代码不可控制的 IFRAME缓存问题, 废除.*/
function XHR(sUrl, fnCallBack) {
fnCallBack = fnCallBack || new Function();
sUrl += (sUrl.indexOf(‘?’) > 0 ? ‘&’: ‘?’) + ‘WINDOWNAME=true’;
var frame = document.createElement(‘iframe’),
state = 0;
document.body.appendChild(frame).style.display = ‘none’;
frame.readyState ? frame.attachEvent(“onload”, done) : frame.onload = done;
frame.src = sUrl;
function getData() {
try {
fnCallBack(frame.contentWindow.name);
frame.contentWindow.document.write(”);
frame.contentWindow.close();
document.body.removeChild(frame);

} catch(e) {
fnCallBack(‘{code:999}’)

}

}
function done() {
state == 1 ? getData() : (state = 1, frame.contentWindow.location = “about:blank”)
}

}

dataRequest.send = function(sUrl, fnCallBack){
//alert(“send”);
if(!sUrl || typeof sUrl !== ’string’){
return;
}

sUrl += (sUrl.indexOf(‘?’) > 0 ? ‘&’ : ‘?’) + ‘windowname=true’;

var frame = this._doc.createElement(‘iframe’), state = 0, self = this;
this._doc.body.appendChild(frame);
frame.style.display = ‘none’;

var clear = function(){
try{
frame.contentWindow.document.write(”);
frame.contentWindow.close();
self._doc.body.removeChild(frame);
}catch(e){}
};

var getData = function(){
try{
var da = frame.contentWindow.name;
}catch(e){}
clear();
if(fnCallBack && typeof fnCallBack === ‘function’){
fnCallBack(da);
}
};

function frameLoad(){
//alert(“onLoad”);
if(state === 1){
alert(“state == 1″);
getData();
} else if(state === 0){
state = 1;
//alert(“state == 0″);
frame.contentWindow.location = “http://localhost:8080/jsp-examples/proxy.html”;
}
};
frame.onload = frameLoad;

frame.src = sUrl;
};

dataRequest.send(‘http://localhost:9080/domain/test.html’,function(data){
alert(data);
});

另外，如果不在web服务环境下，直接本地建个目录测试，确实会发生一些有趣的问题，就像我第一个回帖描述的