Navigation Drop down postioning
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When hovering over "Arts District" and "Property Management" on my site navigation, I need the dropdown position of the sub menu item to be relative to the parent item, seen when you hover over "The Bulding" in this jsFiddle: http://jsfiddle.net/8Wce6/1/

What is the best way to do this? Do I need to create ul id's for each dropdown? Any help is much appreciated. 