window.onload = init;

function init() {
    if(!document.getElementById) {
        return false;
    }
    if(!document.getElementById("popup_player")) {
        return false;
    }
    var popupPlayer = document.getElementById("popup_player");
    popupPlayer.innerHTML = '<a href="#">Popup Music Player</a>';
    popupPlayer.onclick = popUp;
}

function popUp() {
    var Url = "http://www.dougsparling.com/music_player/mplayer.php";
    window.open(Url, 'musicplayer', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=300,height=300');
}