chevoldavis writes "Highlight any text on this site then right click. A tooltip containing the definition of the selected word should show up. This tutorial will show you how to accomplish this, step by step. You can modify it to call any function or webservice. This is similar to the WallStreetJournal.com except they show search results in their tooltip window and they leave the functionality of the context menu while I have chosen to supress it. "
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