javascript 向 xsl 传递参数，为什么传递不了，给位来帮帮小弟

我现在需要向XSL传递一个param,让后获取此param位置的数据

param 名为 pageNum

以下为代码：

javascript:

function loadDocument(fileName)
{
var xmlDoc = window.ActiveXObject ? new ActiveXObject("MSXML2.DOMDocument.3.0") :
document.implementation.createDocument("","",null);
xmlDoc.async = false;
xmlDoc.load(fileName);
return xmlDoc;
}


function getTransformedHTML(xmlDoc, xslDoc) {
var html = "";
if (window.XSLTProcessor)
{
var num = 1 ;
var xmlDom=new ActiveXObject('Msxml2.DOMDocument.3.0');
var docStyle = new ActiveXObject('MSXML2.FreeThreadedDOMDocument');
//var xsltProc = new XSLTProcessor();
//xsltProc.importStylesheet(xslDoc);
//xsltProc.addParameter("pageNum", num);

var docTemplate = new ActiveXObject("Msxml2.XSLTemplate");
docTemplate.stylesheet = docStyle;
var processor = docTemplate.createProcessor();
processor.input = xmlDom;

---------------------------------- 此处为问题关键处-----------------------


processor.addParameter("pageNum",num);

-------------------------------------------
processor.transform();
html = processor.output;



//var fragment = xsltProc.transfrmToDocument(xmlDoc);
//html = new XMLSerializer().serializeToString(fragment);
}
else if (window.ActiveXObject)
{
html = xmlDoc.transformNode(xslDoc);
}
return html;
}

function GenerateCart()
{
var xmlDoc = loadDocument("cart.xml");
var xslDoc = loadDocument("cart.xsl");
var content = getTransformedHTML(xmlDoc, xslDoc);
document.getElementById("cart").innerHTML = getTransformedHTML(xmlDoc, xslDoc);
alert(content);
}

function AddRemoveItem() {}



xsl:

<?xml version="1.0" encoding="utf-8"?>

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:output
method="html"
indent="yes"
version="4.0"
doctype-public="-//W3C//DTD HTML 4.01//EN"
doctype-system="http://www.w3.org/TR/html4/strict.dtd"/>
<xsl:param name="pageNum">undefined</xsl:param>
<xsl:template match="/">
<table id="shoppingcart">
<xsl:call-template name="DisplayCart"></xsl:call-template>
</table>
</xsl:template>


<xsl:template name="DisplayCart">

<xsl:param name="pageNum"/>

<tr class="head">
<td colspan="4" align="center">Shopping Basket <img src="sbasket.gif"></img>
</td>
</tr>
<xsl:if test="string($pageNum) = '' ">
<tr>
<td colspan="4" align="center">error

</td>
</tr>
</xsl:if>
<xsl:if test="number(//book/Quantity)>0">
<tr>
<td class="border">Item</td>

<td class="border">Qty</td>
<td class="border">Price</td>
<td></td>
</tr>
</xsl:if>
<xsl:for-each select="//book[position()=$pageNum]">
<tr>
<td class="border2" width="75px">
<xsl:value-of select="Title"/>
</td>

<td class="border2" align="center">
<xsl:value-of select="Quantity"/>
</td>
<td class="border2">
$<xsl:value-of select="Price * Quantity"/>
</td>
<td class="border2">
<a href="javascript:AddRemoveItem('Remove');">
<img src='button.jpg'/>
</a>
</td>
</tr>
</xsl:for-each>
<tr >
<td colspan='4' class="border2"> </td>

</tr>
<xsl:choose>
<xsl:when test="sum(//book/Quantity)>0">
<tr>
<td colspan="2" class="border2">Total:</td>

<td class="border">
$
<xsl:value-of select="(//Total)"/>
</td>
<td class="border2"> </td>
</tr>
</xsl:when>
<xsl:otherwise>
<tr>
<td colspan = "4" class="border2">Your Basket Is Empty</td>
</tr>
</xsl:otherwise>
</xsl:choose>
<tr >
<td colspan="4" class="border2"> </td>

</tr>
</xsl:template>
</xsl:stylesheet>



问题：

我在XSL里加了个判断，如果参数pageNum为空，则显示error

现在每次都显示error，则证明pageNum在 processor.addParameter("pageNum",num)的时候没有传递成功

请问这是为什么？网上很多例子都这样写的啊

请教如何解决~！！！！！！


[解决办法]
这样是可以的

XML code

<script type="text/javascript">function loadDocument(fileName){    var xmlDoc = window.ActiveXObject ? new ActiveXObject("MSXML2.DOMDocument.3.0") :                                        document.implementation.createDocument("","",null);    xmlDoc.async = false;    xmlDoc.load(fileName);    return xmlDoc;}function getTransformedHTML(xmlDoc, xslDoc) {    var html = "";    if (window.ActiveXObject)    {          var num = 1 ;          var docTemplate = new ActiveXObject("Msxml2.XSLTemplate");      var xslDoc = new ActiveXObject("Msxml2.FreeThreadedDOMDocument.3.0");           xslDoc.async = false;          xslDoc.load("cart.xsl");          docTemplate.stylesheet = xslDoc;          var processor = docTemplate.createProcessor();          processor.input = xmlDoc;          processor.addParameter("pageNum",num);          processor.transform();          html = processor.output;    }       return html;}function GenerateCart(){  var xmlDoc = loadDocument("cart.xml");  var xslDoc = loadDocument("cart.xsl");  var content = getTransformedHTML(xmlDoc, xslDoc);   alert(content);} GenerateCart()</script>