jQuery set iFrame onLoad attribute

Question

I need to trigger a function when the iframe loads a second time (the user clicks some link in the iframe). When the iframe page changes I can set the window location to the iframe src.

What I thought would be best is to set an onLoad attribute on the iframe element after the first load. I guess I would need the live event to tell when the iframe has been created, since it's dynamic.

This is what I had in mind:

$(document).ready(function() {
    $('#tenant_login').fancybox({type:'iframe'});
     $('#tenant_login').click(function() {
        $('#fancybox-frame').attr('onLoad', function() {
          windlow.location = $('#fancybox-iframe').attr('src');
        });
     });
});

If it matters the iframe is not cross domain.