function setchecked() {
    document.cookie="cnchk=true";
  }

  function get_cookie(Name) {
    var search = Name + "="
    var returnvalue = "";
    if (document.cookie.length > 0) {
      offset = document.cookie.indexOf(search)
      // if cookie exists
      if (offset != -1) { 
        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;
        returnvalue=unescape(document.cookie.substring(offset, end))
        }
     }
    return returnvalue;
  }

function dopopup(url, windowname, properties)
{
    mywindow = window.open(url,windowname,properties);
}