function getCookie(name)
{
  var search=name+"="
  if(document.cookie.length > 0)
  { // if there are any cookies
    offset=document.cookie.indexOf(search)
    if(offset !=-1)
    { // if cookie exists
      offset+=search.length          // set index of beginning of value
      end=document.cookie.indexOf(";", offset)  // set index of end of cookie value
      if(end==-1) end=document.cookie.length
      return unescape(document.cookie.substring(offset, end))
    }
  }
  return ""
}

function setCookie(name, value, time)
{ var today=new Date()
  var expire=new Date()
  expire.setTime(today.getTime()+time )
  document.cookie=name+"="+escape(value)+
  ((expire==null) ? "" :("; expires="+expire.toGMTString()))
}