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How to track exact event handler of HTML element, if it is not registered with the element?

Answer 1

A:

Try to do this alert(document.getElementById("numberBox").onkeypress). See if you can see the source code of the onkeypress event. If it is null, it means no event is registered to the onkeypress event.

You can write a for in loop to show all the members (including the event) of an object with javascript.

airmanx86 2010-07-08 12:59:08

The above code returns null on both keypress and keydown events although the input field doesn't allow entering any special characters that means some event is firing which is causing special characters not to be entered in the input text element.Is there any other way to track the listener event handler?

safdarf 2010-07-08 14:58:22

May be the event handler is register on one of parent elements. You know if the 3rd party library uses any other javascript library?

airmanx86 2010-07-09 05:36:30

I try to register the event with jQuery just now and the onkeypress is undefined, but the event work. If I register the event myself with DOM level 0 (i.e. assign the handler directly to onkeypress). It will return the source code. I suspect that the event is registered by attachEvent(IE) / addEventListener(W3C). May be you try to override the event to see if you can work out if it is in the input or somewhere else.

airmanx86 2010-07-09 06:04:48

Answer 2

A:

I am using ASP.NET, Windows XP. Its a 3rd party control and i want to change its current behaviour a little bit by changing its JavaScript.

safdarf 2010-07-08 19:00:32

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How to track exact event handler of HTML element, if it is not registered with the element?

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