覆盖onbeforeunload（javascript）

Question

I try to override window.onbeforeunload of this link http://lpfr.quizir.com/lp.aspx?LpID=332354&PartnerID=weedo

The script is located here : http://lpfr.quizir.com/scripts/exittraffic.js window.onbeforeunload = DisplayExitSplash;

This link is open in a popup, then when I tried to change the link in the popup or close the popup, I can't.

var xwin = window.open(http://lpfr.quizir.com/lp.aspx?LpID=332354&PartnerID=weedo)

Generally, this works: xwin.onbeforeunload = function(){}

But it doesn't work on this specific link >_<

Does anyone have any idea?

Answer 1

onbeforeunload you can just use operators and return because of preventing people from spamming.

So you can't use window.scrollTo , window.alert and document.location.href .

Just spammers want to use these functions onbeforeunload. Remember the client want to leave the page and don't want to close alert windows and get redirected.

Answer 2

To remove all handlers for that event you should remove the DOM level 0 event like:

window.onbeforeunload = null;

like Nico sugests

But also the other ways of event handling like so.

Depending on what browser you use you could do

window.removeEventListener( "beforeunload" );

On Chrome Firefox and other "W3c compliant browsers" or

window.detachEvent( "onbeforeunload" );

On Internet Explorer 6 (i think) and up.

Answer 3

我已经执行过此操作，离开页面没有任何问题

window.onbeforeunload = null