Posted in Javascript onNovember 12, 2009
拐个弯想,如果开始可以获得iframe内部页面信息,那么不能获得的时候,不就说明表单已经提交了么~
我们发现百度的竞价右下角信息,也是采用的这种方法判断的,大家可以参考下。
示例:
test.html:
<html> <head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"></head> <body style="background:#a7a7a7;"> <iframe id="testiframe" name="testiframe"></iframe> <form method="post" action="http://www.test.com/testaction.php" target="testiframe" name="testform"> <input type="text" name="dddd"><input type="submit" value="ddd" name="submitbtn"/> </form> </body> <script> 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; } } </script> </html>
注意下面的代码是跨域的,不是在一个域名下的
testaction.php
<?php 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
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); } } }
跨域表单提交状态的变相判断代码
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