var songtime1 = null;
var doFirstPlay = null;
var songPlaying = false;
var track = 0;
var songNum = null;
var songName = null;
var songTime = null;
var showTitle = null;
var count = 0;
var loop = false;
var playMode = null;
var restLength = null;
var xmllist = null;

function init_music() { 
        
        if (showTitle == null) { showTitle = 1; }
        switch (showTitle) {
                case 0 :
                        document.form1.stitle.style.visibility = "hidden";
                        document.form1.stitle.size = 1;
                        break;
                case 1 :
                        document.form1.stitle.style.visibility = "visible";
                        break;
                case 2 :
                        document.form1.stitle.style.visibility = "hidden";
                        document.form1.stitle.size = 1;
                        break;
                default :
                        showTitle = 1;
        }
        if (playMode == null) { playMode = 0; }
        if (restLength == null) { restLength = 5; }
        if (doFirstPlay == null) { doFirstPlay = 1; }
        if (doFirstPlay == 1) { play(); }
}

function addbgm( url, title, time ) { 
        if (songNum == null) { songNum = new Array(); count = 0;} else { count = songNum.length; }
        if (songName == null) { songName = new Array(); }
        if (songTime == null) { songTime = new Array(); }
        songNum[count] = url;
        if (title == null || title == '' ) { title1 = 'Track ' + (count + 1); } else { title1 = title; }
        songName[count] = title1;
        songTime[count] = time;
}

function chgLoop() { 
        if (loop == false) {loop = true;}
        else {loop = false;}
}


function play() {
        if (songPlaying) { 
        alert("放歌ing");
        return;
        }
        
        switch (playMode) {
                case 0 :
                        track = 0;
                        break;
                case 1 : 
                        track = Math.floor(Math.random() * songNum.length);
                        break;
                default : 
                        track = 0;
        }
chooseSong(track);
}

function stopTrack() { 
        document.Music.Stop() 
        if (songPlaying) { 
        clearTimeout(songtime1); 
        }
        else { alert("已经停了，还停？"); return false;}
        songPlaying = false; 
        updateTrack(); 
}

function checkloop( action ) { 
        if ( loop == true ) { chooseSong(track); }
        else {
                switch (action) {
                        case "next" : 
                                nextTrack();
                                break;
                        case "pre" : 
                                preTrack();
                                break;
                        default :  
                                alert("没了");
                                stopTrack();
                }
        }
}

function chooseSong(aaa) { 
        if (songPlaying) { 
        clearTimeout(songtime1); 
        }
        track = aaa; 
        
        if(track > songNum.length - 1 || track < 0) { alert("chooseSong"); return false;} 
                var nowtrack1 = songNum[track];
                document.Music.Open(nowtrack1); 
                songPlaying = true; 
                updateTrack(); 
                var t_time1 = songTime[track] + restLength;
                var t_time = t_time1 * 1000;
                songtime1 = setTimeout("checkloop('next')",t_time); 
}

function nextTrack() { 
        if (playMode == 1) { var num = Math.floor(Math.random() * songNum.length); } 
        else {
                if(track == songNum.length - 1) { var num = 0; } 
                else { var num = track + 1; }
        }
        chooseSong(num);
}

function preTrack() { 
        if (playMode == 1) { var num = Math.floor(Math.random() * songNum.length); } 
        else {
                if(track == 0) { var num = songNum.length - 1; } 
                else { var num = track - 1; }
        }
        chooseSong(num);
}

function updateTrack() { 
        if (songPlaying) { 
        track_idx = track + 1; 
        switch (showTitle) {
                case 0 :
                        window.status = ('updateTrack'); return true;
                        break;
                case 1 :
                        document.form1.stitle.value = "" + track_idx + ". " + songName[track];
						//document.form1.stitle.value = songName[track];
                        break;
                case 2 :
                        window.status = ('' + track_idx + '. ' + songName[track]); return true;
                        break;
                default :
                        window.status = ('updateTrack'); return true;
                }
        }
        else { 
                switch (showTitle) {
                case 0 :
                        window.status = ('停止ing'); return true;
                        break;
                case 1 :
                        document.form1.stitle.value = "停止ing";
                        break;
                case 2 :
                        window.status = ('停止ing'); return true;
                        break;
                default :
                        window.status = ('停止ing'); return true;
                }
        }
}

function m_list() { 
        window.open('music_sele.html','LinksRemote','width=400,height=350,scrollbars=1,resizable=1');
}