跨域表单提交状态的变相判断代码_javascript技巧

test.html:
代码如下:







document.testform.onsubmit = function () {
document.testform.submitbtn.disabled = true;
submitMonitor();

}
function submitMonitor () {
try{
var hash = document.getElementById('testiframe').contentWindow.location.hash;
setTimeout(submitMonitor,100);
} catch (e) {
document.getElementById('testiframe').src = "about:blank";
document.testform.submitbtn.disabled = false;
}
}



注意下面的代码是跨域的，不是在一个域名下的
testaction.php
代码如下:
sleep(5);
echo $_POST['dddd'];
?>

弊端：
这个弊端还很明显，如果是404，403，500等错误，也会误认为是成功提交。
所以，请注意：此方法属研究，开拓思维用。
这段是百度的判断代码
代码如下:
var sfMessTimes;
function sfMessSubmitMonitor () {
try{
var hash = sf_mess_lib.getElement(SF_MESS_FRAME_ID).contentWindow.location.hash;
sfMessTimes ++;
if (sfMessTimes > 50) {
alert(sf_mess_msg.fail);
sf_mess_lib.getElement(SF_MESS_SUBMIT_ID).disabled = false;
for (var i = 0, l = sf_mess_cols.length; i < l; i++) {
document.getElementById(SF_MESS_PREFIX + sf_mess_cols[i].idname).disabled = false;
}
} else {
setTimeout(sfMessSubmitMonitor,100);
}
} catch (e) {
sf_mess_lib.getElement(SF_MESS_FRAME_ID).src = "about:blank";
alert(sf_mess_msg.success);
sf_mess_lib.getElement(SF_MESS_SUBMIT_ID).disabled = false;
for (var i = 0, l = sf_mess_cols.length; i < l; i++) {
var inputCfg = sf_mess_cols[i];
var inputEl = document.getElementById(SF_MESS_PREFIX + inputCfg.idname);
inputEl.disabled = false;
inputEl.value = filtInnertip(inputCfg.innertip);
}
}
}