function getRandomInt(min, max) {
	return Math.floor(Math.random() * (max - min + 1)) + min;
}
var tek = 0;
function chnav(i) {
	document.getElementById("lnk"+i).className = "act";
	if (tek > 0) document.getElementById("lnk"+tek).className = "";
	tek = i;
}
var requestObj;
var tek_id = 0;
var turn = false;
if (window.XMLHttpRequest) {
	requestObj = new XMLHttpRequest();
} else if (window.ActiveXObject) {
	requestObj = new ActiveXObject("Msxml2.XMLHTTP");
	if (!requestObj) requestObj = new ActiveXObject("Microsoft.XMLHTTP");
}
function turn_music() {
	if (turn == false) {
		turn = true;
		document.getElementById("music").style.display = "none";
		if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) document.getElementById("music").innerHTML = "";
		document.getElementById("music_ico").src = "/images/music_off.png";
	} else {
		turn = false;
		if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) show_music();
		document.getElementById("music").style.display = "block";
		document.getElementById("music_ico").src = "/images/music.png";
	}
}
function show_music() {
	if (turn == true) return;
	requestObj.open("GET", "/cgi-bin/music.cgi?tek_id=" + tek_id + "&rkey=" + Math.random(), true);
	requestObj.onreadystatechange = update_music;
	requestObj.send(null);
}
function update_music() {
	if (requestObj.readyState == 4) {
		var response = requestObj.responseText;
		var arr = new Array();
		arr = response.split(/~~/g);
		tek_id = arr[1];
		document.getElementById("music").innerHTML = arr[2];
		if (arr[0] > 0) setTimeout('show_music();', (arr[0]*1000))
	}
}