Showing Script error while editing a page in livesite

shiks

while editing a page, whenever i try editing a component it throws some wierd error: "A script is trying to slow your browser. Do you wnt to abort it?"
I am not able to recognize that script? I have seen the component coding also, i think this issue is regarding to a page rather than to a component. Please help.. and throw some light on it.

Also i am getting this script error in some of the pages only.

Thanks in advance
Shikha