(function($) {
$.fn.prd = function(y){

    var height = $(window).height();
    var width = $(window).width();
    var heightC = $(this).height();
    var widthC = $(this).width();

    var nW = (width/2)-widthC/2;
    var nH = (height/2)-heightC/2;

    $(this).css('left', nW);
    $(this).css('top', nH);
    


   };
   
$(window).bind("resize", function(){
                   $('#content').prd();
                });
   
})(jQuery);
$(function() {
      $('#content').prd();
});