Web Development Newbie

function setCookie(n, v) {
var cookieStr = "";
var date = new Date();
date.setTime(date.getTime()+(3*30*24*60*60*1000));
var expiry = "; expires="+date.toGMTString();
cookieStr = n + " = " + v + ";expires="+expiry+";path=/ "  ;
document.cookie = cookieStr;
}