$(document).ready(function() {
  assignWindowEvents();
}); 

function assignWindowEvents() {
  $("a.xLink").click(function () {
     window.open($(this).attr("href"),'newWindow');
     return false;
  });
  $("a.xPopup").click(function () {
     this.newWindow = window.open($(this).attr("href"),'popup','');
     this.newWindow.focus();
     this.newWindow.opener = window;
     return false;
  });
}