I came accross this thread when googling, I had the exact same problem. All the above solutions did not work for my case. I came up with a solution myself, which might be of help to others.

I used

window.onload = document.getEle mentById('frame id').setAttribu te('onload', 'whateverfuncti onyouwant();');

as far as I can see this works for all browsers I tested on. Tested on Safari, Firefox, IE and Opera...