Initialisation code for jQuery UI datepicker widget

jqueryDatepickerInit.js

$(document).ready(function() {
	$('.datePicker').each(function(){
		var $this = $(this); // cache the this object
		$this.keydown( function(event){ 
				if ( event.keyCode !== 9 ){ // If key is not Tab - for accessibility
					event.preventDefault(); // Prevents user input, forces user to use Calendar Date Picker widget
				}
			}) 
			.datepicker({
				showOn          : 'both', // displays Calendar widget on focus of input and on clicking the Calendar icon
				buttonText	: 'Choose a date', // Alt text for Calendar icon
				buttonImage     : '/includes/jqueryCalendar/cal.gif', // source to the Calendar button icon
				buttonImageOnly : true, // only show the icon, not the buttonText
				dateFormat      : 'dd-mm-yy' // format of the date
			});
		$this.datepicker( "setDate" , new Date() ); // Prefills the input with the current date to stop form history showing up on click
	});
});

Initialisation code for jQuery UI datepicker widget