var Popup = new function() {
  this.session=function() {
    if (!document.referrer || !document.location) return false;
	var l=""+document.location;
	var r=""+document.referrer;
	var i=l.indexOf("/", 8);
	return l.substring(0,i)==r.substring(0,i);
  }
  this.open=function(label, timeout) {
    if (!this.session() && Cookie.getCookie(label)!="v")
      window.setTimeout("Popup.show('"+label+"')", timeout);
  },
  this.show=function(label) {
    var popup=document.getElementById(label);
    popup.style.display="block";
  },
  this.close=function(label) {
    document.getElementById(label).style.display="none";
    return false;
  },
  this.go=function(label, url) {
    Cookie.setCookie(label, "v", 365);
    window.open(url);
    Popup.close(label);
    return false;
  }
}