function getCookie(name)
{
	var dcookie = document.cookie;
	var cname = name + "=";
	var clen = dcookie.length;
	var cbegin = 0;
	while (cbegin < clen) {
		var vbegin = cbegin + cname.length;
		if (dcookie.substring(cbegin, vbegin) == cname) {
			var vend = dcookie.indexOf (";", vbegin);
			if (vend == -1) vend = clen;
			return unescape(dcookie.substring(vbegin, vend));
		}
		cbegin = dcookie.indexOf(" ", cbegin) + 1;
		if (cbegin == 0) break;
	}
	return null;
}

var expdate = new Date ();

function setCookie (name, value, expires) {
	if (!expires) expires = new Date();
	document.cookie = name + "=" + escape (value) + "; expires=" + expires.toGMTString() +  "; path=/";
}

function delCookie (name) {
	var expireNow = new Date();
	document.cookie = name + "=" + "; expires=Thu, 01-Jan-70 00:00:01 GMT" +  "; path=/";
}


function hide_menu()
{
  expdate.setTime(expdate.getTime()+(1000*60*60*10));
  setCookie('fullscreen','true',expdate);
}


function show_menu()
{
  delCookie('fullscreen');
}