How do I make fancybox href dynamic?

I have the following fancybox code:

$('.fancybox').fancybox({
             'autoScale' : false,
             'href' : $('.fancybox').attr('id'),
             'type':'iframe',
             'padding' : 0,
             'closeClick'  : false,

//some other callbacks etc

the problem is I have twenty different A tag id's on the page and I want the fancybox href attribute to take the id of the clicked element, ie the one that triggered the event.

I have tried several things, none of them have worked!

'href' : $(this).attr('id'),
'href' : $(this.element).attr('id'),

This seems so simple but anytime I plug in 'this' or similar nothing works.