Callback after calling attr method

Callback after calling attr method

I'm using the following code to refresh an iframe:

    $("#support-link").click (function () {                                          
        $("#zenbox_iframe").attr ({                                        
            src: $("#zenbox_iframe").attr ("src")                                            
        });                              
        Zenbox.show (); // displays iframe
        return false;                                  
    });

The problem is that Zenbox.show () gets called before the src attribute is fully loaded, so the refresh is visible to the user.

Is there any way to setup a callback when the iframe.src is fully loaded that I can call Zenbox.show() in ?

Thanks,
Cliff