ms-DatePicker

requires PickADate.js or PickerDate.js ?
http://amsul.ca/pickadate.js/date/

<div class="ms-DatePicker" id="ID_datepicker"> 
** insert ** 
</div> 

<script type="text/javascript" src="picker.date.js"></script> 
<script type="text/javascript"> 
$(document).ready(function() { 
   var options = {}; 
   if ($.fn.DatePicker) { 
      $('.ms-DatePicker'}.DatePicker(options);  
   } 
}); 
</script>