<!--

var playMusic;
var cookie;
var days;

days = 60;

function startMusic() { 
playMusic = getCookie("playMusic"); 
switch (playMusic) {
	case "play" :    
		musicOn(); 
		break;  
	case "noplay" :	                                                                           
   		musicOff();
   		break;
   	default :
   		playMusic = "play";
   		setMusicCookie(); 
   	}		
                                  		                                                                                  		
}

function musicOff() {
document.MIDI.stop()
document.onoff.B1.value='Turn Music On';
playMusic = "noplay";                                   
setMusicCookie();                                
}

function musicOn() {
document.MIDI.play()
document.onoff.B1.value='Turn Music Off';
playMusic = "play";                                   
setMusicCookie();                                
}

function changeButton() {
if (document.onoff.B1.value=='Turn Music Off') 
	musicOff();

else 
	musicOn();
  
}



function setMusicCookie() {                                       
  var date = new Date ();                                         
  fixDate(date);                                                  
  date.setTime (date.getTime() + (86400 * 1000 * days));  
  setCookie("playMusic", playMusic, date)         
}     

//----------------------------------------------------------------------------
// Set Cookie
//----------------------------------------------------------------------------

// Boolean variable specified if alert should be displayed if cookie exceeds 4KB
var caution = true

// name - name of the cookie
// value - value of the cookie
// [expires] - expiration date of the cookie (defaults to end of current session)
// [path] - path for which the cookie is valid (defaults to path of calling document)
// [domain] - domain for which the cookie is valid (defaults to domain of calling document)
// [secure] - Boolean value indicating if the cookie transmission requires a secure transmission
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments
function setCookie(name, value, expires, path, domain, secure) {
var curCookie = name + "=" + escape(value) +
    ((expires) ? "; expires=" + expires.toGMTString() : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
if (!caution || (name + "=" + escape(value)).length <= 4000)
    document.cookie = curCookie;
else
    if (confirm("Cookie exceeds 4KB and will be cut!"))
       document.cookie = curCookie;
}

//----------------------------------------------------------------------------
// Get Cookie
//----------------------------------------------------------------------------

// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist
function getCookie(name) {
var prefix = name + "=";
var cookieStartIndex = document.cookie.indexOf(prefix);
if (cookieStartIndex == -1)
   return null;
var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length);
if (cookieEndIndex == -1)
   cookieEndIndex = document.cookie.length;
return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex));
}

//----------------------------------------------------------------------------
// Delete Cookie
//----------------------------------------------------------------------------

// name - name of the cookie
// [path] - path of the cookie (must be same as path used to create cookie)
// [domain] - domain of the cookie (must be same as domain used to create cookie)
// * path and domain default if assigned null or omitted if no explicit argument proceeds
function deleteCookie(name, path, domain) {
if (getCookie(name)) {
   document.cookie = name + "=" +
       ((path) ? "; path=" + path : "") +
       ((domain) ? "; domain=" + domain : "") +
        "; expires=Thu, 01-Jan-70 00:00:01 GMT"
}
}

//----------------------------------------------------------------------------
// Fix date object
//----------------------------------------------------------------------------

// date - any instance of the Date object
// * you should hand all instances of the Date object to this function for "repairs"
// * this function is taken from Chapter 14, "Time and Date in JavaScript", in "Learn Advanced JavaScript Programming"
function fixDate(date) {
var base = new Date(0);
var skew = base.getTime();
if (skew > 0)
   date.setTime(date.getTime() - skew);
}

/*
var now = new Date();
fixDate(now);
now.setTime(now.getTime() + 31 * 24 * 60 * 60 * 1000);
var name = getCookie("name");
if (!name)
   name = prompt("Please enter your name:", "John Doe");
setCookie("name", name, now);
document.write("Hello " + name + "!");
*/
                                                            

//-->