Question

If I reset window.alert to be some other function, is there any way for me to restore it w/o first “saving” it?

For example:

window.alert = function() { };

After doing that, is there a way of restoring window.alert() to what it used to be? (btw: asking this only for “predefined” DHTML objects – not for random js objects)

Answer 1

You can use delete:

window.alert = function() { };
delete window.alert;

Here’s a working example.