(function ($) {

     var position = "";

     $.fn.divPosition = function (obj, div_position) {

         position = div_position;
         var element = this;

         $(window).bind("resize", function () {
             changeCss(obj, position);
         });

         changeCss(obj, position);

         function changeCss(obj, position) {

             if (position == 'center') {
                 var elementHeight = $(element).height();
                 var elementWidth = $(element).width();
                 var obj_width = $(obj).width();
                 var obj_height = $(obj).height();

                 $(element).css({
                     position: 'absolute',
                     'left': obj_width / 2 - elementWidth / 2,
                     'top': obj_height / 2 - elementHeight / 2
                 });

             }
             else
                 if (position == 'topCenter') {
                     var elementHeight = $(element).height();
                     var elementWidth = $(element).width();
                     var obj_width = $(obj).width();
                     var obj_height = $(obj).height();

                     $(element).css({
                         position: 'absolute',
                         'left': obj_width / 2 - elementWidth / 2,
                         'top': 0
                     });
                 }
                 else
                     if (position == 'bottomCenter') {
                         var elementHeight = $(element).height();
                         var elementWidth = $(element).width();
                         var obj_width = $(obj).width();
                         var obj_height = $(obj).height();

                         $(element).css({
                             position: 'absolute',
                             'left': obj_width / 2 - elementWidth / 2,
                             'bottom': 0
                         });
                     }
         };

     };
 })(jQuery);