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1、document.getElementById()
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2、document.getElementsByName()
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3、document.getElementsTagName() TagName翻译为标签名
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4、document.createElement()
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查询方法:
如果有id属性,优先使用getElementById方法来进行查询;
如果没有id属性,则优先使用getElementsByName方法进行查询;
如果id属性和name属性都没有最后再按标签名getElementsByTagName方法查询。
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