江湖救急ActiveXObject("Microsoft.XMLDOM")方法取值！！！

<PROTECTSET>
    <TPSET>
        <PDBTAB>T54_2007_3301_V207</PDBTAB>
        <PZBITEM>
            <PPZBNO>120000</PPZBNO>
            <PBINITEM>
                <BINITEM>V2</BINITEM>
                <PSJS>20070101</PSJS>
                <ENGNSCAPE />
            </PBINITEM>
            <PBINITEM>
                <BINITEM>V3</BINITEM>
                <PSJS>20070101</PSJS>
                <ENGNSCAPE />
            </PBINITEM>
            <PBINITEM>
                <BINITEM>V4</BINITEM>
                <PSJS>20070101</PSJS>
                <ENGNSCAPE />
            </PBINITEM>
        </PZBITEM>
    </TPSET>
<PROTECTSET>
var psjs = getNode(porderDoc,"/PROTECTSET/TPSET[PDBTAB=\"T54_2007_3301_V207\"]/PZBITEM[PPZBNO=\"120000\"]/PBINITEM[BINITEM=\"V2\"]/PSJS");
这句取<PSJS>20070101</PSJS>应该怎么写！！！
先谢过指点！