function setCookie(name, value, expires) {
var deCookie = name + "=" + escape(value);
if(expires){
expires= expires.toGMTString();
deCookie += "; expires="; 
deCookie += expires; 
}
document.cookie = deCookie;
}

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));
}