How can get the id of the focused element of the web page

[nayana4u]

I want to take the id of the focused element in the page by javascript.
but with my situation i cant use the onFouse() method of each element to call other javascript element.

simply without changing the body of the page i want to get the id of focused element.

how can i do it?
plz help me all the experts soon!!!!!

[rnd me]

it is a property of document:

   alert(document.activeElement)

check out MDC for more info.

this used to be IE only, until firefox 3 picked it up. so, it won't work in FF2 and perhaps other browsers