$(function()
{
    $.datepicker.setDefaults(
            {
             showOn: 'both', 
             showAnim: 'fadeIn', 
             buttonImageOnly: true,
             buttonImage: '/website/Images/cal.gif',
             firstDay: 1
            }
    );

    $('input.date-picker').datepicker({dateFormat: 'dd/mm/yy'});
});