$(document).ready(function(){ 

    $("#nav span").css("opacity","0");   
        
    $("#nav span").hover(function () {   
        $(this).stop().animate({ opacity: 1 }, 250);
    },
    function () {
        $(this).stop().animate({ opacity: 0 }, 500);
    });

    
});

function playAudio(url) {
    the_html = "<embed src=\"" + url + "\" autostart=\"true\" loop=\"false\" style=\"background:#F2EFC2; height:90px;\" />";
    
    $("#audio_placeholder").html(the_html);
}