Autocompletion text boxes are one of those nifty little tools that when used in the right setting really add a great user experience. Just recently I was trying to figure out how to return JSON from a autocomplete call and use jQuery. Older versions of jQuery only support line break text return values limiting you on what you could return. So hoping to find something better, I Googled it and low and behold, jQuery UI now incorporates the autocomplete feature using JSON results by default! As of v1.7, I believe, this is supported. There is a good blog by Jörn Zaefferer, talking about the work involved in migrating from the old jQuery autocomplete plug-in to the new method.
You can get either download jQuery UI versions or use Google CDN.
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