var posHeight = (window.screen.height/2)-(266/2);
var posWidth  = (window.screen.width/2)-(266/2);

var jhwin;

function openpopup(){
var popurl="/content/promo.htm"
jhWin = window.open(popurl, "mapWin", "toolbar=no, directories=no, location=no, status=no, menubar=no, resizable=no, scrollbars=no, width=360, height=500, left ="+ posWidth +", top ="+ posHeight);
}

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

function loadornot(){
if (get_cookie('poppedup')==''){
openpopup()
document.cookie="poppedup=yes"
}
}