Date Picker in AJAX

hi friends..,
I don know how to use data picker in php using ajax.., can any one pls help.. i m in beginers stage.., i want to finish my project

I don't know if you've already found examples (using Google)?
http://www.google.com/#hl=en&ei=nNebSsqYCNXFmQfM1tWxBA&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=ajax+date+picker&spell=1&fp=9b1c6ebfff7f9103

Also, a lot of Javascript possiblities:
http://www.google.com/#hl=en&source=hp&q=javascript+date+picker&aq=f&aqi=g10&oq=&fp=9b1c6ebfff7f9103