Ok, I am going to rephrase my request as I think based on some of the answers, it got convoluted. All I am looking for is if there is a javascript command to fire the onload event from the javascript in the parent. A line of code such as:
document.getElementById('FrameID').fire.onload();
or if this cannot be done.

I am brainstorming an application where I am going to preload some iframes with url's, say 10 of them. I am then going to rotate them by hiding and displaying the frames. I want to be able to fire a window onload event after the active frame is displayed without reloading the page so the page will act as if it is fresh if it has an onload event. Can I do this? The pages may or may not have a window onload event.