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

//BACK TREN IE
var br_s = navigator.userAgent.toLowerCase();
if (br_s.indexOf('opera')!= -1)
browser='op';
else if (br_s.indexOf('netscape')!= -1)
browser='ns';
else if (br_s.indexOf('firefox')!= -1)
browser='ff';
else
browser='ie';
//END 


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 sendRequest(current_url,act) {
	try{
		if (act == 'Play' || act == 'Gift' || act == 'Play_Album' || act == 'Play_Singer' || act == 'Play_Nhacsi' || act == 'Play_Playlist')
			field = document.getElementById("playing_field");
			else if (act == 'Download')
			field = document.getElementById("download_field");
		else field = document.getElementById("data_field");
        if (loading==0) {
            loading=1;
            show_Loading();
        }  
		
	
		current_url = encodeURIComponent(current_url);
		http.open('POST',  'index.php');
		http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		http.onreadystatechange = handleResponse;
		http.send('url='+current_url);
	}
	catch(e){}
	finally{}
}

function handleResponse() {
    try {
        if((http.readyState == 4)&&(http.status == 200)){
            response = http.responseText;
            if (current_url.indexOf('Play') != -1 || current_url.indexOf('Gift') != -1) {
                field.style.marginBottom = "10";
            }
            field.innerHTML = response;
            hide_Loading();
            loading=0;
            field.style.display = "";
            field.scrollIntoView();
        }
      }
    catch(e){}
    finally{}
}

// + ---------------------- +
// |  BEGIN Loading Alpha   |
// + ---------------------- +
var ie45,ns6,ns4,dom;
if (navigator.appName=="Microsoft Internet Explorer") ie45=parseInt(navigator.appVersion)>=4;
else if (navigator.appName=="Netscape"){  ns6=parseInt(navigator.appVersion)>=5;  ns4=parseInt(navigator.appVersion)<5;}
dom=ie45 || ns6;

var timershow=false;
var curx=-200;
var cury=200;
var win_w=window.innerWidth ? window.innerWidth : document.body.offsetWidth;
var mid_w=win_w/2;
var timershow1=window.setInterval("stayMiddle()",1);

function getobj(id) {
el = document.all ? document.all['LoadingDiv'] :   dom ? document.getElementById('LoadingDiv') :   document.layers['LoadingDiv'];
return el;
}

function show_Loading() {
    obj = getobj();
    if (timershow) window.clearTimeout(timershow);
    timershow=window.setInterval("nshow()",1);
}

function hide_Loading() {
    obj = getobj();
    if (timershow) window.clearTimeout(timershow);
    timershow=window.setInterval("nhide()",1);
}

function moveobj(obj,x,y) {
    obj.style.left=x + "px";
    obj.style.top=y+ "px";
    curx=x;
    cury=y;
}

function stayMiddle() {
    if (document.documentElement && document.documentElement.scrollTop)
        var pY =  document.documentElement.scrollTop;
    else if (document.body)
        var pY =  document.body.scrollTop;

    obj = getobj();
    newy = cury+((pY-cury)/16)+12;
    moveobj(obj,curx, newy);
}

function nshow() {
    obj = getobj();
    newx = curx+((mid_w-curx)/16)-7;
    moveobj(obj,newx, cury);
}
function nhide() {
    obj = getobj();
    newx = curx+((0-curx)/16)-15;
    moveobj(obj,newx, cury);
}
// + ---------------------- +
// |    END Loading Alpha   |
// + ---------------------- +  



function getVar(url,cnt)
{
	url=url+'#';
	url=url.split('#');
	if (!url[1]) window.location.href = '#Home';
	url=url[1];
	url=url+',';
	url=url.split(',');
	if (url[0] == 'Logout')
		window.location.href = '?refresh=1';
	if (cnt != -1) {
		url=url[cnt];
		if (!url) return '';
	}
	return url;
}

function loadPage() {
	act = getVar(window.location.href,0);
	if (act) {
		current_url=window.location.href;
		current_url=current_url+'#';
		current_url=current_url.split('#');
		current_url=current_url[1];
		if (current_url) sendRequest(current_url,act);
	}
}

function urlCheck()
{
url=window.location.href;
if (url.indexOf('?') != -1 ) {
url_temp = url.split('?');
clearInterval(interval);
window.location.href = url_temp[0];

}
if (url != '' && url!=lastUrl)
{
loadPage();
url_hs = window.location.href;
url_hs = url_hs.split('#');
url_hs = url_hs[1];
if (browser=='ie') document.getElementById("ieHistory").src='history.php?history='+url_hs;
lastUrl=url;
}

} 
function startLoad() {
	interval = setInterval('urlCheck()',100);
}

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('url=Broken,'+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("Lỗi. Mong bạn thử lại.");
		}
  	}
	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);
		s_type = document.getElementById("searchType");
		type = s_type.options[s_type.selectedIndex].value;
		switch (type) {
			case 'song' : type = 1; break;
			case 'singer' : type = 2; break;
			case 'album' : type = 3; break;
			case 'nhacsi' : type = 5; break;
			
		}
		last_url = '';
		window.location.href = '#Search,'+type+','+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 window.location.href = '?refresh=1';
		}
  	}
	catch(e){}
	finally{}
}

function login(form) {
	name = eval('encodeURIComponent('+form+'.name.value);');
	pwd = eval('encodeURIComponent('+form+'.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 = '#Login';
			}
		}
  	}
	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);
	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) == "" )
		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+'&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() {
	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);
	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&email='+email+'&oldpwd='+oldpwd+'&newpwd='+newpwd_1+'&sex='+sex+'&hide_sex='+h_sex+'&hide_email='+h_email);
		}
		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 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('gift.php?id='+id,'gift',width,height);
}

function comment(id,width,height) {
	popup('comment.php?id='+id,'comment',width,height);
}

function receive_gift(id) {
	window.location.href = '#Gift,'+id;
}

function showComment(media_id,pg) {

 try {

  document.getElementById("loading_comment").innerHTML = loadingText;

  document.getElementById("loading_comment").style.display = "block";

  http.open('POST',  'comment.php');

  http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

  http.onreadystatechange = function() {

   if((http.readyState == 4)&&(http.status == 200)){

    document.getElementById("loading_comment").style.display = "none";

    document.getElementById("comment_field").innerHTML = http.responseText;

   }

  }

  http.send('lvcomment=1&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 != 1) {

    if (document.getElementById("nocomment")) document.getElementById("nocomment").innerHTML = '';

    btns = document.getElementById('newcomment');

    oLI = document.createElement('div');

    oLI.innerHTML = "<div id=newcomment>"+response+"</div>";

    btns.parentNode.insertBefore(oLI, btns);

    document.getElementById("loading_comment").style.display = "none";

    document.getElementById("comment_content").value = "";

    return false;

   }

   else document.getElementById("loading_comment").innerHTML = "<div class=love align=center>Bạn hãy đợi một lúc nữa rồi hãy gửi tiếp</div>";

  }

   }

 catch(e){}

 finally{}

}

function comment_check_values() {

 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 > 500)

  alert("Nội dung cảm nhận quá 500 ký tự.");

 else {

  try {

   document.getElementById("loading_comment").innerHTML = loadingText;

   document.getElementById("loading_comment").style.display = "block";

   http.open('POST',  'comment.php');

   http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

   http.onreadystatechange = comment_handleResponse;

   http.send('comment=1&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',  'comment.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() {
         if(document.getElementById("rating_process")) document.getElementById("rating_process").style.display = "block";
    }
    function hide_rating_process() {
        document.getElementById("rating_process").style.display = "none";
    }
// END RATING

function mediaNext()
{
        if(document.getElementById("baihientai"))
           $idnext = document.getElementById("baihientai").value;
  s=$idnext;
  window.location='#Play,'+s;
}



function Quick_Play(type,media_id) {
    try {
        current_id = document.getElementById(type+"_current_quickplay").value;
        if(current_id) Close_Quick_Play(type,current_id);
        document.getElementById(type+"_current_quickplay").value = media_id;
        if (navigator.appName=="Microsoft Internet Explorer")
            document.getElementById(type+"_show_hide_quickplay_"+media_id).style.display = "block";
        else
            document.getElementById(type+"_show_hide_quickplay_"+media_id).style.visibility = "visible";
        document.getElementById(type+"_quickplay_field_"+media_id).innerHTML = loadingText;
        document.getElementById(type+"_quickplay_field_"+media_id).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(type+"_quickplay_field_"+media_id).innerHTML = http.responseText;
                document.getElementById(type+"_quickplay_control_"+media_id).src = 'img/qplaycol.gif';
                document.getElementById(type+"_quickplay_control_"+media_id).onclick = function() {Close_Quick_Play(type,media_id);}
                document.title = WEBTITLE;
            }
        }
    http.send('quick_play='+media_id);
    }
    catch(e){}
    finally{}
    return false;
}

function Close_Quick_Play(type,media_id) {
    document.getElementById(type+"_quickplay_field_"+media_id).innerHTML = '';
    if (navigator.appName=="Microsoft Internet Explorer")
        document.getElementById(type+"_show_hide_quickplay_"+media_id).style.display = "none";
    else
        document.getElementById(type+"_show_hide_quickplay_"+media_id).style.visibility = "collapse";
    document.getElementById(type+"_quickplay_control_"+media_id).src = 'img/qplayex.gif';
    document.getElementById(type+"_current_quickplay").value = '';
    //alert('Quick_Play(\''+type+'\','+media_id+')');
    document.getElementById(type+"_quickplay_control_"+media_id).onclick = function() {Quick_Play(type,media_id);}
    return false;
}