Javascript / IE 6/7: check if there is an iframe inside

Question

I have a page that should check if it is contained in an iframe or not, whether the page affects the top page.

I tried to do this: if(window == window.parent)and it works for Opera, FF and Chrome, but not for IE. is there any trick in IE that I should use?

Answer 1

if (top != self)
{
    // I'm in an iframe
}