gistfile1.js

jQuery.fn.center = function () {
  this.css("position","absolute");
  this.css("top", (($(window).height() - this.outerHeight()) / 2) + $(window).scrollTop() + "px");
  this.css("left", (($(window).width() - this.outerWidth()) / 2) + $(window).scrollLeft() + "px");
  return this;
}			
			
$('.ui-datepicker').datepicker({ 
  onShow: function(picker, inst) { 
    //Code to show the datepicker in the center.
    $('.ui-datepicker').center();					
  } 
});