lib/webrat/selenium/location_strategy_javascript/webrat.js
var locationStrategies = selenium.browserbot.locationStrategies;
return locationStrategies['id'].call(this, locator, inDocument, inWindow)
|| locationStrategies['name'].call(this, locator, inDocument, inWindow)
|| locationStrategies['label'].call(this, locator, inDocument, inWindow)
|| null;