Javascript pop-up over Vimeo video - CSS layout order

Is there such thing as a layer or an order of items that conflict in the same space? I have a pop-up signin box, somewhat similar to Twitter.com, but when it pops open, it is behind a Vimeo video in the middle of the screen. Is there a CSS style to make it appear on top of the video instead of behind it? In gra开发者_高级运维phic design tools there is often a move-to-front option, any equivalent to that in CSS? Can't show my page yet or I would.

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That would be the z-index in css. The higher is more to the front.

However... you are probably dealing with flash transparency here instead. To fix that you will have to set the wmode to transparent. See this question for more info about wmode: differences between using wmode="transparent", "opaque", or "window" for an embedded object on a webpage