Ajax Availability Calendar

Easiest to Use AJAX/Javascript/Web 2.0 Framework? I am looking into Ajax/Javascript/Web 2.0 App Frameworks because writing cross-browser Javascript code that does Ajax calls and DOM manipulations is very complicated and time consuming. _______________________ yahoo keyword tool ~ overture ~ traffic ...

How to use ajax validation for forms in php? I need to know with codes or example how can ajax be used in php for form validations, slide shows etc.
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