取决于你想做什么。第四种和第六种方法不会重新加载任何表单数据，它们实质上是单独访问页面。某些版本的Firefox也存在第三种方法的问题。除此之外，我会选择第五个作为个人偏好。这似乎是最清楚的。

Depends on what you want to do. The fourth and sixth methods there won't reload any form data, they essentially make a separate visit to the page. Some versions of Firefox also have issues with the third method. Other than that, I'd go with the fifth as a personal preference. It seems the clearest.