jQuery.fn.center = function(loaded) {
    var objs = this;
    body_width = parseInt($(window).width());
    body_height = parseInt($(window).height());
    
    objs.each(function() {
        var obj = $(this)
        var block_width = parseInt(obj.width());
        var block_height = parseInt(obj.height());
        
        var left_position = parseInt((body_width/2) - (block_width/2)  + $(window).scrollLeft());
        if (body_width < block_width) { left_position = 0 };
        var top_position = parseInt((body_height/2) - (block_height/2) + $(window).scrollTop());
        if (body_height < block_height) { top_position = 0 };
        
        if(!loaded) {
        
            obj.css({'position': 'absolute'});
            obj.css({'left': left_position, 'top': top_position});
            $(window).bind('resize', function() { 
                obj.center(!loaded);
            });
            $(window).bind('scroll', function() { 
                obj.center(!loaded);
            });
            
        } else {
            obj.stop();
            obj.css({'position': 'absolute'});
            obj.animate({'left': left_position, 'top': top_position}, 200, 'linear');
        }
    });
}