var N   = (document.layers) ? true:false;                 // netscape 4
var IE   = (document.all) ? true:false;                    // ie4+
var DOM = ((document.getElementById)&&(!IE))?true:false;   // ns6 etc.


function Zobraz(a) {
	nameMenu = a;
 
	if (IE) {document.all[nameMenu].style.visibility = "visible";}
	if (N) {document[nameMenu].visibility = "visible";}
	if (DOM) {document.getElementById(nameMenu).style.visibility = "visible";}
}

function Schovej(m) {

	nameMenu =  m;
	if (IE) {document.all[nameMenu].style.visibility = "hidden";}
	if (N) {document[nameMenu].visibility = "hidden";}
	if (DOM) {document.getElementById(nameMenu).style.visibility = "hidden";}
}

function zastavit() {
				musicPlayer.removePlayer();
      	if (IE) {document.all['music-on'].style.visibility = "visible";}
      	if (N) {document['music-on'].visibility = "visible";}
      	if (DOM) {document.getElementById('music-on').style.visibility = "visible";}		
      	if (IE) {document.all['music-off'].style.visibility = "hidden";}
      	if (N) {document['music-off'].visibility = "hidden";}
      	if (DOM) {document.getElementById('music-off').style.visibility = "hidden";} 			
}

		//<![CDATA[
		window.onload = function() {
			document.getElementById('music-off').onclick = function() {
				musicPlayer.removePlayer();
      	if (IE) {document.all['music-on'].style.visibility = "visible";}
      	if (N) {document['music-on'].visibility = "visible";}
      	if (DOM) {document.getElementById('music-on').style.visibility = "visible";}		
      	if (IE) {document.all['music-off'].style.visibility = "hidden";}
      	if (N) {document['music-off'].visibility = "hidden";}
      	if (DOM) {document.getElementById('music-off').style.visibility = "hidden";}  				
				return false;
			}
			document.getElementById('music-on').onclick = function() {
				musicPlayer.createPlayer();
      	if (IE) {document.all['music-off'].style.visibility = "visible";}
      	if (N) {document['music-off'].visibility = "visible";}
      	if (DOM) {document.getElementById('music-off').style.visibility = "visible";}		
      	if (IE) {document.all['music-on'].style.visibility = "hidden";}
      	if (N) {document['music-on'].visibility = "hidden";}
      	if (DOM) {document.getElementById('music-on').style.visibility = "hidden";}        		
				return false;			
			}
			
			var checkCookie = readCookie('sound');
			if (!checkCookie) {
				musicPlayer.createPlayer();
			}
		}
		//]]>