- http://zhidao.baidu.com/link?url=-oEHQETFpjnqDhgrrdBjNsnOIpu63R954SaJ8A5bRXdBxTpOGSiA3uHm4b7MnlC-Ji2BbWUVyROGKc7pils0uK
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vertical-align:text-bottom基础
css代码：vertical-align:text-bottom; margin-bottom:2px; margin-bottom:-2px\9;
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vertical-align:text-top基础
css代码：height:13px; vertical-align:text-top; margin-top:0;
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vertical-align:bottom基础
css代码：height:15px; vertical-align:bottom; margin-bottom:3px; margin-top:-1px;
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vertical-align:middle基础
css代码：vertical-align:middle; margin-top:-2px; margin-bottom:1px;