Empty Elements Must Also Be Closed 空的元素也必须关闭 Empty elements must either have an end tag or the start tag must end with />. 空的元素也必须有一个结束标签或者开始标签用/>结束。
This is wrong: 这是错误的:
This is a break<br> Here comes a horizontal rule:<hr> Here''''s an image <img src="http://www.jb51.net/article/happy.gif" alt="Happy face">This is correct: 这是正确的:
This is a break<br />
Here comes a horizontal rule:<hr />Here''''s an image <img src="http://www.jb51.net/article/happy.gif" alt="Happy face" /> IMPORTANT Compatibility Note: 注意兼容性的关键: To make your XHTML compatible with today''''s browsers, you should add an extra space before the "http://www.jb51.net/" symbol like this: <br />, and this: <hr />. 为了使你的XHTML能够兼容现在的浏览器,你必须在/符号之前加一个特殊的空格,就像这样:<br />和这样:<hr />
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