Gradient border?

I've been trying to work out how to create a gradient border that appears above the background. Like this (http://modforest.com/csp/) demo from modforest (http://www.modforest.com/freebies/coming-soon-page-css3-wordpress-theme.php). Any help will be appreciated!

there really is not an edge, but a div tag inside another. Do this, create a div tag with padding of some 5px, place the background you want it, then create another div tag inside that, with white background. You made ​​the edge! This is the best way to create borders in dreamweaver. use and abuse of trick. I hope this helps.
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