I am familiar to jQuery selector like $('form') but I am not able to understand what the selector $('form', currentPanel) in the below code mean. Please help.
_onWizardNextClick : function() {
 var currentPanel = this.getActivePanel();
 var form = $('form', currentPanel);
 if (form.length == 1 && form.data('validator') && !form.valid()) {
  return;
 }
}