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document.getElementsByTagName("a")[0].getAttributeNode("target");

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element.getAttributeNode(attributename)

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attributename String ±ØÐè¡£ÐèÒª·µ»ØµÄÊôÐÔµÄÃû³Æ¡£

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DOM °æ±¾ Core Level 1 Element Object
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