text: define(['knockout'], function(ko) {
    'use strict';
  
    ko.bindingHandlers.popup = {
      init: function(el, valueAccessor) {
        var url = el.getAttribute('href');
        var name = el.innerHTML;
  
        el.addEventListener('click', function() {
          var newWindow = window.open(url, name, 'height=500, width=500');
          if(window.focus) { newWindow.focus; }
          return false;
        });
      }
    };
  });
  
  