如何在Javascript中设置页面的基本href？

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我想根据当前主机名在Javascript中设置页面的基本href属性。我已生成可在不同主机名上查看的HTML页面，这意味着生成基本href标记将在一个主机名中工作，但在另一个主机名中将不正确。

I want to set a page's base href attribute in Javascript based off of the current hostname. I have generated HTML pages that can be viewed on different hostnames, which means generating a base href tag will work in one hostname but will be incorrect in the other.

推荐答案

这样做的正确方法是根据当前主机名做一个标签的document.write：

The correct way of doing this is to do a document.write of the tag based off the current hostname:

正确：

<script type="text/javascript"> document.write("<base href='" + document.location.host + "' />"); </script>

此方法在IE，FF，Chrome和Safari中产生了正确的结果。它产生（正确的）不同于下面的结果：

This method has produced correct results in IE, FF, Chrome, and Safari. It produces a (correct) different result than dowing the following:

不正确：

<script type="text/javascript"> var newBase = document.createElement("base"); newBase.setAttribute("href", document.location.hostname); document.getElementsByTagName("head")[0].appendChild(newBase); </script>