function popup_tourstogo(partnerID,tourID,height,width) {

  height = isNaN(height) ? 280 : height;
  width  = isNaN(width)  ? 250 : width;

  partnerStr = isNaN(partnerID) ? '' : '?p='+partnerID; 

  var ttg = window.open('http://www.tourstogo.com/calendar/'+tourID + '-calendar/' + partnerStr,'ttg','width='+width+',height='+height+'');

  return void(0);

}