New button with popup calendar

Hi,

I need to build a new button in list page. The button is used to open a popup calendar, select one day and do something in php with selected date. How can I do to have the selected date value in client before-> server? <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=22835&image=1&table=forumtopics' class='bbc_emoticon' alt=':blink:' />