var http = createRequestObject();
var lastUrl = '';
var current_url = '';
var field = '';
var interval = '';
var loading=0;

// BEGIN RATING
var RATE_OBJECT_IMG = 'images/rate/full.gif';
var RATE_OBJECT_IMG_HOVER = 'images/rate/full.gif';
var RATE_OBJECT_IMG_HALF = 'images/rate/half.gif';
var RATE_OBJECT_IMG_BG = 'images/rate/none.gif';
// END RATING
var loadingText = "<center><img src='images/loading.gif'> <b>Đang tải dữ liệu ...</b></center>";

function SoH_Media(obj,is_close) {
	var hideshow = document.getElementById(obj);
	if (is_close) {
		//hideshow.innerHTML = '';
		//hideshow.style.display = "none";
		document.getElementById('playing').innerHTML = '';
	}
	else {
		if(hideshow.style.display != "none") {
			hideshow.style.display = "none";
			document.getElementById("SoH").innerHTML = '[+] Hiện mục nghe nhạc';
		}
		else {
			hideshow.style.display = "block";
			document.getElementById("SoH").innerHTML = '[-] Dấu mục nghe nhạc';
		}
	}
	return false;
}

function SoH_Comment(obj) {
	var hideshow = document.getElementById(obj);
	if(hideshow.style.display != "none") {
			hideshow.style.display = "none";
			document.getElementById("SoH2").innerHTML = '[+] Hiện mục cảm nhận';
	}
	else {
		hideshow.style.display = "block";
		document.getElementById("SoH2").innerHTML = '[-] Dấu mục cảm nhận';
	}
	return false;
}

function createRequestObject() {
	var xmlhttp;
	try { xmlhttp=new ActiveXObject("Msxml2.XMLHTTP"); }
	catch(e) {
    try { xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");}
	catch(f) { xmlhttp=null; }
  }
  if(!xmlhttp&&typeof XMLHttpRequest!="undefined") {
	xmlhttp=new XMLHttpRequest();
  }
	return  xmlhttp;
}

function alertBrokenLink(id) {
	if (confirm("Báo Link nhạc này đã hỏng ?")) {
		try{
			http.open('POST',  'index.php');
			http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			http.onreadystatechange = BrokenResponse;
			http.send('broken=1&id='+id);
		}
		catch(e){}
		finally{}
	}
}

function BrokenResponse() {
	try {
		if((http.readyState == 4)&&(http.status == 200)){
			response = http.responseText;
			if (response == 1) alert("Thông báo đã được gởi đi. Cám ơn bạn đã báo cho chúng tôi.");
			else alert("Cám ơn bạn đã báo cho chúng tôi.");
		}
  	}
	catch(e){
		alert("Lỗi. Mong bạn thử lại.");
	}
	finally{}
}

function do_search() {
	kw = document.getElementById("keyword").value;
	if (!kw) alert('Bạn chưa nhập từ khóa');
	else {
		kw = encodeURIComponent(kw);
		kw = kw.replace(/%20/g,'+');
		s = document.getElementsByName("searchtype");
		if (s[0].checked) type = 'song';
		if (s[1].checked) type = 'artist';
		if (s[2].checked) type = 'album';
		if (s[3].checked) type = 'lyric';
		if (s[4].checked) {
		window.open('http://www.google.com/cse?cx=015666771313082309286%3A-tbvnfq27nw&ie=UTF-8&q='+kw+'&sa=Ti%CC%80m+ki%C3%AA%CC%81m');
		}
		else {
		last_url = '';
		window.location.href = 'http://trachanh.com/Music/Search.html?t='+type+'&q='+kw;
		}
	}
	return false;

}

// + ---------------------- +
// |        PLAYLIST        |
// + ---------------------- +

function reloadPlaylist(add_id,remove_id) {
	try{
		document.getElementById("playlist_field").innerHTML = loadingText;
		http.open('POST',  'index.php');
		http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		http.onreadystatechange = playlist_handleResponse;
		http.send('reloadPlaylist=1&add_id='+add_id+'&remove_id='+remove_id);
	}
	catch(e){}
	finally{}
}

function playlist_handleResponse() {
	try {
		if((http.readyState == 4)&&(http.status == 200)){
			var response = http.responseText;
			document.getElementById("playlist_field").innerHTML = response;
		}
  	}
	catch(e){}
	finally{}
}

function addToPlaylist(song_id)
{
	reloadPlaylist(song_id,0);
}
function removeFromPlaylist(song_id)
{
	reloadPlaylist(0,song_id);
}

/*------------------------------------------------------*/

function trim(a) {
	return a.replace(/^s*(S*(s+S+)*)s*$/, "$1");
}

// + ------------------- +
// |        LOGIN        |
// + ------------------- +

function login_handleResponse() {
	try {
		if((http.readyState == 4)&&(http.status == 200)){
			document.getElementById("login_loading").style.display = "none";
			var response = http.responseText;
			if (response) {
				document.getElementById("login_loading").innerHTML = response;
				document.getElementById("login_loading").style.display = "block";
			}
			else {
				alert("Bạn đăng nhập thành công !");
				window.location.href = 'http://trachanh.com/Music/';
			}
		}
  	}
	catch(e){}
	finally{}
}

function login(form) {
	name = encodeURIComponent(document.getElementById("name") .value);
	pwd = encodeURIComponent(document.getElementById("pwd"). value);
	if(	trim(name) == "" ||	trim(pwd) == "")
		alert("Bạn chưa nhập đầy đủ thông tin");
	else {
		try{
			document.getElementById("login_loading").innerHTML = loadingText;
			document.getElementById("login_loading").style.display = "block";
			http.open('POST',  'index.php');
			http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			http.onreadystatechange = login_handleResponse;
			http.send('login=1&name='+name+'&pwd='+pwd);
			
		}
		catch(e){}
		finally{}
	}
	return false;
}

// + ---------------------- +
// |        REGISTER        |
// + ---------------------- +

function reg_handleResponse() {
	try {
		if((http.readyState == 4)&&(http.status == 200)){
			document.getElementById("reg_loading").style.display = "none";
			var response = http.responseText;
			if (response) {
				document.getElementById("reg_loading").innerHTML = response;
				document.getElementById("reg_loading").style.display = "block";
			}
			else {
				window.location.href = 'http://trachanh.com/Music/Login.html';
			}
		}
  	}
	catch(e){}
	finally{}
}

function reg_check_values() {
	ok = false;
	name = encodeURIComponent(document.getElementById("reg_name").value);
	pwd = encodeURIComponent(document.getElementById("reg_pwd").value);
	pwd2 = encodeURIComponent(document.getElementById("reg_pwd2").value);
	email = encodeURIComponent(document.getElementById("reg_email").value);
	bday = encodeURIComponent(document.getElementById("reg_bday").value);
	bmonth = encodeURIComponent(document.getElementById("reg_bmonth").value);
	byear = encodeURIComponent(document.getElementById("reg_byear").value);
	fullname = encodeURIComponent(document.getElementById("reg_fullname").value);
	yahoo = encodeURIComponent(document.getElementById("reg_yahoo").value);

	u_area = document.getElementById("u_area");
	area = u_area.options[u_area.selectedIndex].value;
	agree = document.getElementById("agree").checked;
	sec_num = document.getElementById("sec_num").value; 

	s = document.getElementsByName("reg_sex");
	if (s[0].checked) sex = s[0].value;
	if (s[1].checked) sex = s[1].value;
	
	if(	trim(name) == "" ||	trim(pwd) == "" ||	trim(pwd2) == "" ||	trim(email) == "" || trim(bday) == "" ||	trim(bmonth) == "" ||	trim(byear) == "" || trim(fullname) == "" || trim(yahoo) == "" )
		alert("Bạn chưa nhập đầy đủ thông tin");
	else
		if (pwd != pwd2) alert("Xác nhận mật khẩu không chính xác");
		else if (!agree) alert("Bạn chưa đồng ý với các quy định của trang Web");
		else {
			try{
				document.getElementById("reg_loading").innerHTML = loadingText;
				document.getElementById("reg_loading").style.display = "block";
				http.open('POST',  'index.php');
				http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
				http.onreadystatechange = reg_handleResponse;
				http.send('reg=1&name='+name+'&pwd='+pwd+'&email='+email+'&bday='+bday+'&bmonth='+bmonth+'&byear='+byear+'&fullname='+fullname +'&yahoo='+yahoo+'&area='+area+'&sex='+sex+'&sec_num='+sec_num);
			}
			catch(e){}
			finally{}
		}
	return ok;
}

// + ------------------------- +
// |        CHANGE INFO        |
// + ------------------------- +

function change_info_handleResponse() {
	try {
		if((http.readyState == 4)&&(http.status == 200)){
			document.getElementById("change_info_loading").style.display = "none";
			var response = http.responseText;
			if (response) {
				document.getElementById("change_info_loading").innerHTML = response;
				document.getElementById("change_info_loading").style.display = "block";
			}
			else window.location.href = '?refresh=1';
		}
  	}
	catch(e){}
	finally{}
}

function change_info() {
	status = encodeURIComponent(document.getElementById("u_status").value);
	email = encodeURIComponent(document.getElementById("u_email").value);
	oldpwd = encodeURIComponent(document.getElementById("u_oldpwd").value);
	newpwd_1 = encodeURIComponent(document.getElementById("u_newpwd_1").value);
	newpwd_2 = encodeURIComponent(document.getElementById("u_newpwd_2").value);
	avatar_input = encodeURIComponent(document.getElementById("u_avatar_input").value);
    avatar_local = encodeURIComponent(document.getElementById("u_avatar_local").value);
	h_sex = document.getElementById("hide_sex").checked;
	h_email = document.getElementById("hide_email").checked;
	s = document.getElementsByName("u_sex");
	if (s[0].checked) sex = s[0].value;
	if (s[1].checked) sex = s[1].value;
	if(	trim(email) == "" )
		alert("Bạn chưa nhập đầy đủ thông tin");
	else if (newpwd_1 != newpwd_2)
		alert("Xác nhận mật khẩu không đúng");
	else {
		try{
			document.getElementById("change_info_loading").innerHTML = loadingText;
			document.getElementById("change_info_loading").style.display = "block";
			http.open('POST',  'index.php');
			http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			http.onreadystatechange = change_info_handleResponse;
			http.send('change_info=1&status='+status+'&email='+email+'&oldpwd='+oldpwd+'&newpwd='+newpwd_1+'&sex='+sex+'&hide_sex='+h_sex+'&hide_email='+h_email+'&avatar_input='+avatar_input+'&avatar_local='+avatar_local);
		}
		catch(e){}
		finally{}
	}
	return false;
}

// + ----------------------------- +
// |        FORGOT PASSWORD        |
// + ----------------------------- +

function forgot_handleResponse() {
	try {
		if((http.readyState == 4)&&(http.status == 200)){
			document.getElementById("forgot_loading").style.display = "none";
			var response = http.responseText;
			if (response) {
				document.getElementById("forgot_loading").innerHTML = response;
				document.getElementById("forgot_loading").style.display = "block";
			}
		}
  	}
	catch(e){}
	finally{}
}

function forgot() {
	email = encodeURIComponent(document.getElementById("u_email").value);
	if(	trim(email) == "" )	alert("Bạn chưa nhập email");
	else {
		try{
			document.getElementById("forgot_loading").innerHTML = loadingText;
			document.getElementById("forgot_loading").style.display = "block";
			http.open('POST',  'index.php');
			http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			http.onreadystatechange = forgot_handleResponse;
			http.send('forgot=1&email='+email);
		}
		catch(e){}
		finally{}
	}
	return false;
}

function request_check_values() {
    ok = false;
    title_request = encodeURIComponent(document.getElementById("title_request").value);
    singer_request = encodeURIComponent(document.getElementById("singer_request").value);
    ym_request = encodeURIComponent(document.getElementById("ym_request").value);
    email_request = encodeURIComponent(document.getElementById("email_request").value);
    info_request = encodeURIComponent(document.getElementById("info_request").value);
   
    if(    trim(title_request) == "" ||    trim(email_request) == "" )
        alert("Bạn chưa nhập đầy đủ thông tin");
    else {
        try{
            document.getElementById("reg_loading").innerHTML = loadingText;
            document.getElementById("reg_loading").style.display = "block";
            http.open('POST',  'index.php');
            http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
            http.onreadystatechange = reg_handleResponse;
            http.send('request=1&title_request='+title_request+'&singer_request='+singer_request+'&ym_request='+ym_request+'&email_request='+email_request+'&info_request='+info_request);
           
        }
        catch(e){}
        finally{}
    }
    return ok;
}

// + ----------------------------- +
// |            COMMENT            |
// + ----------------------------- +

function showComment(type,media_id,pg) {
	try {
		document.getElementById("comment_field").innerHTML = loadingText;
		document.getElementById("comment_field").style.display = "block";
		http.open('POST',  'index.php');
		http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		http.onreadystatechange = function() {
			if((http.readyState == 4)&&(http.status == 200)){
				document.getElementById("comment_field").innerHTML = http.responseText;
			}
		}
		http.send('showcomment=1&type='+type+'&media_id='+media_id+'&pg='+pg);
	}
	catch(e){}
	finally{}
	return false;
}

function comment_handleResponse() {
	try {
		if((http.readyState == 4)&&(http.status == 200)){
			var response = http.responseText;
			if (response == 'OK') {
				type = encodeURIComponent(document.getElementById("type").value);
				media_id = encodeURIComponent(document.getElementById("media_id").value);
				showComment(type,media_id,1);
			}
			else document.getElementById("comment_loading").innerHTML = response;

		}
  	}
	catch(e){}
	finally{}
}

function comment_check_values() {
	type = encodeURIComponent(document.getElementById("type").value);
	media_id = encodeURIComponent(document.getElementById("media_id").value);
	comment_content = encodeURIComponent(document.getElementById("comment_content").value);
	if(trim(comment_content) == "")
		alert("Bạn chưa nhập cảm nhận");
	else if (comment_content.length > 255)
		alert("Nội dung cảm nhận quá 255 ký tự.");
	else {
		try {
			document.getElementById("comment_loading").innerHTML = loadingText;
			document.getElementById("comment_loading").style.display = "block";
			http.open('POST',  'index.php');
			http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			http.onreadystatechange = comment_handleResponse;
			http.send('comment=1&type='+type+'&media_id='+media_id+'&comment_content='+comment_content);
		}
		catch(e){}
		finally{}
	}
	return false;
}

function comment_delete(media_id,comment_id) {
	if (confirm("Bạn có muốn xóa cảm nhận này không ?")) {
		document.getElementById("comment_loading").innerHTML = loadingText;
		document.getElementById("comment_loading").style.display = "block";
		http.open('POST',  'index.php');
		http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		http.onreadystatechange = comment_handleResponse;
		http.send('delete=1&media_id='+media_id+'&comment_id='+comment_id);
	}
	return false;
}

// BEGIN RATING
function Rating(media_id,star) {
	try {
		document.getElementById("rate_s").innerHTML = loadingText;
		document.getElementById("rate_s").style.display = "block";
		hide_rating_process();
		http.open('POST',  'rating.php');
		http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		http.onreadystatechange = function() {
			if((http.readyState == 4)&&(http.status == 200)){
				document.getElementById("rating_field").innerHTML = http.responseText;
			}
		}
		http.send('rating=1&media_id='+media_id+'&star='+star);
	}
	catch(e){}
	finally{}
	return false;
}


	// pre-fetch image
	(new Image()).src = RATE_OBJECT_IMG;
	(new Image()).src = RATE_OBJECT_IMG_HALF;
	(new Image()).src = RATE_OBJECT_IMG_BG;

	function show_star(starNum) {
		remove_star();
		full_star(starNum);
	}
	
	function full_star(starNum) {
		for (var i=0; i < starNum; i++)
			document.getElementById('star'+ (i+1)).src = RATE_OBJECT_IMG;
	}
	function remove_star() {
		for (var i=0; i < 5; i++)
			document.getElementById('star' + (i+1)).src = RATE_OBJECT_IMG_BG; // RATE_OBJECT_IMG_REMOVED;
	}
	function show_rating_process() {
		document.getElementById("rating_process").style.display = "block";
	}
	function hide_rating_process() {
		document.getElementById("rating_process").style.display = "none";
	}
// END RATING

function  Replaces(string) {
string=string.replace(/'/g,"\'");
return string
}

function popup(url,wdname,width,height)
{
	if (width == null)  { width  = 200; }   // default width
	if (height == null) { height = 400; }   // default height
	newwin=window.open(url,wdname,'fullscreen=no,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width='+width+',height='+height);
	if (document.all)
	{
		newwin.moveTo(0,0);
		newwin.focus();
	}
}

function gift(id,width,height) {
	popup('http://trachanh.com/Music/Tang-Nhac/'+id+'.html','gift',width,height);
}

function receive_gift(id) {
	window.location.href = 'http://trachanh.com/Music/Gift/'+id+'.html';
}

function must_login() {
	alert('Vui lòng đăng nhập để sử dụng chức năng này!!!!');
}