What behavior do you want, how do you not grasp the problem..
Mr Man makes some javascript for his page/ad, the code sucks- probably is doing something different for IE.
The script runs, and gets 'hot', ie- its going on forever.. IE realizes this, and asks you.. young lady, I know you be busy n all that, but this page is probably fkd, SHOULD I stop it?
How can IE possibly have better behavior, not only did it discover the site is doing something wrong and tell you, but it even let you ignore it if you so wished.