firefox

     /**
      * 捕获回车事件
      *
      */
      function checkEnter(your_param1, your_param2)
      {
           if (window.event.keyCode == 13)
           {
                yourfunction(your_param1, your_param2)
           }
      }

/**
      * 捕获回车事件
      *
      */
     function checkEnter(your_param1,your_param2, e)
     {
         var msie = (document.all) ? true : false;
         var keycode;
         if(!msie)keycode=e.which;
         else keycode=e.keyCode;
         if (keycode==13)
         {
             yourfunction(your_param1, your_param2);
         }
     }