I am using jQuery's colorbox to open up an iframe on a page. On the page there are two flash SWFs. When I click the button that opens the colorbox, those flash SWFs appear over the top of my colorbox div. I've checked the CSS properties of the colorbox, and the overlay has position:absolute and z-index:999. I have given the SWFs a z-index:0 property, but they still show over the top of the colorbox. This happens in Firefox, IE, and Chrome.