$(document).ready(function(){
 
    $(".rollover").css({'visibility':'visible'});
    $(".rollover").css({'opacity':'0'});
 
	$('.website_button span').hover(
		function() {
			$(this).find('.rollover').stop().fadeTo(500, .7);
		},
		function() {
			$(this).find('.rollover').stop().fadeTo(500, 0);
		}
	)
 
});