code: function(e) {
  	   inputEx.PasswordField.superclass.onKeyPress.call(this,e);
  	   
  	   if(this.options.capsLockWarning) {
           var ev = e ? e : window.event;
           if (!ev) {
              return;
           }
           var targ = ev.target ? ev.target : ev.srcElement;
        
           // get key pressed
           var which = -1;
           if (ev.which) {
              which = ev.which;
           } else if (ev.keyCode) {
              which = ev.keyCode;
           }
           // get shift status
           var shift_status = false;
           if (ev.shiftKey) {
              shift_status = ev.shiftKey;
           } else if (ev.modifiers) {
              shift_status = !!(ev.modifiers & 4);
           }
           var displayWarning = ((which >= 65 && which <=  90) && !shift_status) ||
                                ((which >= 97 && which <= 122) && shift_status);
           this.setCapsLockWarning(displayWarning);
        }
        
  	}
docs: callback to display the capsLockWarning