javascript怎么读取xml里面的值？

Question

//使用selectSingleNode方法
<SCRIPT>
function fnCheck(){
   var oNode = oMetaData.XMLDocument.selectSingleNode
       ("METADATA/ABSTRACT");
   alert(oNode.text);
}
</SCRIPT><XML ID="oMetaData">
  <METADATA>
     <AUTHOR>John Smith</AUTHOR>
     <GENERATOR>Visual Notepad</GENERATOR>
     <PAGETYPE>Reference</PAGETYPE>
     <ABSTRACT>Specifies a data island</ABSTRACT>
  </METADATA>
</XML><INPUT TYPE=button VALUE="Test" onclick="fnCheck()" ID=Button1>

Answer 1

<SCRIPT>
function fnCheck(){
   var oNode = oMetaData.XMLDocument.selectSingleNode
       ("playlist/playurl");
   alert(oNode.text);
}
</SCRIPT><XML ID="oMetaData">
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type='text/xsl' href='a.xsl'?>
<playlist>
  <playurl>mms://218.1.74.226/pg/entertainment/SHE.wmv</playurl>
</playlist>
</XML><INPUT TYPE=button VALUE="Test" onclick="fnCheck()" ID=Button1>

Answer 2

xsl有语法<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/playlist">
    <xsl:value-of select="playurl"/>
</xsl:template>
</xsl:stylesheet>