function setCookie(c_name,value,expiredays)
{
var today = new Date();
var expiration_past = new Date(today.getTime() + 24 * 60 * 60 * 1000)
 document.cookie=c_name+ "=" +escape(value)+
 ((expiredays==null) ? "" : ";expires="+expiration_past.toGMTString())
}

function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=")
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1
    c_end=document.cookie.indexOf(";",c_start)
    if (c_end==-1) c_end=document.cookie.length
    return unescape(document.cookie.substring(c_start,c_end))
    }
  }
return null
}