$(window).bind('load resize', function(e){
  if (e.type === 'resize'){
    $('.drop_shadow_layer').remove();
  }

	$('.shadow').each(function(){
  
	  $('<div class="drop_shadow_layer">').appendTo($('body')).css({
		position: 'absolute',
		width: 10 + $(this).width() + 'px',
		height: 10 + $(this).height() + 'px',		
		zIndex: -5000,
		top: ($(this).offset().top + 4) + 'px',
		left: ($(this).offset().left + 4) + 'px'
	  });
	  
	});

});