javascript - How do I convert a jQuery Date value to a long value? -

i have jquery date function shows output july 09 2012. want change string value long value 1335363564815, e.g. milliseconds. how can this?

this code calender:

<script type="text/javascript">          $('#date2').jdpicker({date_format:"ff dd yyyy"});  </script> 

i use plugin: jquery.jdpicker.js

you can

var milliseconds  = date.parse($('#date2').val()); 

as docs says

parses string representation of javascript date, , returns number of milliseconds

demo here