[removed] Overriding alert()

Question

Has anyone got any experience with overriding the alert() function in JavaScript?

• Which browsers support this?
• Which browser-versions sup

Answer 1

As said in many of the other answers, you can just override the function with

window.alert = null

or

window.alert = function(){}

however, this doesn't necessarily override the function on the prototype of the Window constructor (note the capital W), so the hacker can still type:

Window.prototype.alert.apply(window, ["You were hacked!"]);

therefore, you also need to override that function with:

Window.prototype.alert = null

or

Window.prototype.alert = function(){}