// JavaScript Document
function setCookie(cookieName,cookieValue,nDays) 
{
 var today = new Date();
 var expire = new Date();
 if (nDays==null || nDays==0) nDays=365;
 expire.setTime(today.getTime() + 3600000*24*nDays);
 document.cookie = cookieName+"="+escape(cookieValue)
                 + ";expires="+expire.toGMTString();
}

// Sets the user's screen width as a cookie
function getScreenWidth()
{
  setCookie("screen_width", screen.width);
}