/*You can also place this code in a separate file and link to it like epoch_classes.js*/
  var bas_cal,dp_cal,ms_cal;      
window.onload = function () {
  dp_cal  = new Epoch('epoch_popup','popup',document.getElementById('popup_container'));
  dp_cal  = new Epoch('epoch_popup','popup',document.getElementById('popup_container2'));
};