How can I use InputBoxes in macros with JScript?

How can I use InputBoxes in macros with JScript:

  var vb = {};
  vb.Function = function(func)
  {
    return function()
    {
      return vb.Function.eval.call(this, func, arguments);
    };
  };

  vb.Function.eval = function(func)
  {
    var args = Array.prototype.slice.call(arguments[1]);
    for (var i = 0; i < args.length; i++)
    {
      if ( typeof args[i] != 'string' )
      {
      continue;
      }
      args[i] = '"' + args[i].replace(/"/g, '" + Chr(34) + "') + '"';
    }
    var vbe;
    vbe = new ActiveXObject('ScriptControl');
    vbe.Language = 'VBScript';
    return vbe.eval(func + '(' + args.join(', ') + ')');
  };

  /** InputBox(prompt[, title][, default][, xpos][, ypos][, helpfile, context]) */
  var InputBox = vb.Function('InputBox');

  /** MsgBox(prompt[, buttons][, title][, helpfile, context]) */
  var MsgBox = vb.Function('MsgBox');

  function showMsgBox( )
  {
    MsgBox("can you see this message box?", 4, "Answer the question!");
  }