Make it center

gistfile1.js

//Make it center e.g $('.spotlight').centerfill();

(function ($, undefined) {
   //Changing logic to set left and -ve margin to align center
	$.fn.centerfill = function () {
        return this.each(function () {

            var iWidth  = $(this).width();
            var iHeight = $(this).height();            
            var parent  = $(this).parent();
            //parent.css('position', 'relative');
            var pWidth  = $(parent).width();
            var pHeight = $(parent).height();
            
            var marginTop  = 0;
			var top = 0;			
            if (iHeight > pHeight) {
            	//top = 0;
            } else {
				top = '50%';
            	marginTop = 0-iHeight/2
            }
			
			var marginLeft  = 0;
			var left = 0;			
            if (iWidth > pWidth) {
            	//left = 0;
            } else {
				left = '50%';
            	marginLeft = 0-iWidth/2
            }

            //alert(marginLeft);
           
            $(this).css({
                'top': top,
                'margin-top': marginTop,
                'left': left,
                /*'margin-left': marginLeft*/
            });
        });
    };
})(jQuery);