function getCookie(name){
	var cookies = document.cookie.split(/; /g);
	var cookie;
	for(var i=0; i<cookies.length; i++){
		cookie=cookies[i].split("=");
		if(cookie[0] == name){
			var value = cookie[1];
		}
	}
	return value;
}

if (getCookie('music') == undefined){
	document.cookie = 'music = true';
}

function setCookie() {
	document.cookie = 'music = false';
}
function delCookie() {
	document.cookie = 'music = true';
}