$(document).ready(function() {
		$('.phase-1,.phase-2,.phase-3,.phase-4,.facebook_link,.btn_tvc,.btn_submit,.btn_download,.btn_listen').append('<span class="hover"></span>').each(function () {
	  		var $span = $('>span.hover', this).css('opacity', 0);
	  		$(this).hover(function () {
	    		$span.stop().fadeTo(500, 1);
	 		}, function () {
	   	$span.stop().fadeTo(500, 0);
	  		});
		});
	});