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Entity - Entity ¶¨Òå½Úµã£¬<!ENTITY foo "foo">
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Comment - ×¢Êͽڵã
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ELEMENT_NODE---------------------------1
ATTRIBUTE_NODE-------------------------2
TEXT_NODE---------------------------------3
CDATA_SECTION_NODE------------------4
ENTITY_REFERENCE_NODE--------------5
ENTITY_NODE------------------------------6
PROCESSING_INSTRCTION_NODE-----7
COMMENT_NODE--------------------------8
DOCUMENT_NODE------------------------9
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DOCUMENT_FRAGMENT_NODE---------11
NOTATION_NODE-------------------------12
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<style type="text/css">
body{background-color:#EEEEEE; font-size:12px;line-height:22px;}
span{border:#333333 1px dashed; padding:2px;}
</style>
<script language="javascript" type="text/javascript">
function nodetype(){
var a=document.createElement("div");
var c=document.createElement("span");
var b=document.createTextNode("this is text");
c.appendChild(b); //Îı¾Ìí¼Óµ½ÔªËؽڵã
a.appendChild(c);  //span½ÚµãÌí¼Óµ½div½Úµã
document.body.appendChild(a);
var newc=a.cloneNode(true);  //true£ºÈ«²¿¸´ÖÆ£¬°üÀ¨×Ó½Úµã
document.body.appendChild(newc);
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