function getCookie(name) {
 	var dc = document.cookie;
 	var prefix = name + "=";
 	var begin = dc.indexOf("; " + prefix);
 	if (begin == -1) {
   		begin = dc.indexOf(prefix);
   		if (begin != 0) return null;
 	} else
   		begin += 2;
	var end = document.cookie.indexOf(";", begin);
	if (end == -1) end = dc.length;
	return unescape(dc.substring(begin + prefix.length, end));
}


function setCookie(NameOfCookie, value) {
	document.cookie = NameOfCookie + "=" + escape(value)+ "; expires=Thu, 04-Jan-2007 00:00:01 GMT";
}

function delCookie (NameOfCookie) { 
	if (getCookie(NameOfCookie)) {
		document.cookie = NameOfCookie + "=" + "; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}