[xsl] Passing parameters through javascript: what does or doesn't work

[Davide Girlando <dado2_714@xxxxxxxx>]

Hello everyone, I'm an XSLT novice and I tried out this technology to make a job for my apprentice
period in a firm, that is also my Bachelor Thesis. I'm using Javascript to pass parameters, with
some code I adapted from some research which uses ActiveX; I'm not so satisfied with this, but I'm
making it easy to eventually switch to PHP when everything will be transfered on a server.
Coming to the issue, I've written this code as a part of a template: it should provide links to a
dynamic item paging control.


>> fl.xsl

<xsl:param name="viewmethod" select="'js'"/>
<xsl:param name="itemsperpage" select="'50'"/>
<xsl:param name="page" select="'1'"/>
...
	<xsl:for-each select="/rdf:RDF/nm:flItem[(position() - 1) mod $itemsperpage = 0]">
		<xsl:call-template name="link">
			<xsl:with-param name="text">
				<xsl:value-of select="position()"/>
			</xsl:with-param>
			<xsl:with-param name="view">
				fl
			</xsl:with-param>
			<xsl:with-param name="param">
product=<xsl:value-of select="/rdf:RDF/nm:productName[1]"/>&amp;itemsperpage=<xsl:value-of
select="$itemsperpage"/>&amp;page=<xsl:value-of select="position()"/>
			</xsl:with-param>
		</xsl:call-template>
	</xsl:for-each>
...
<xsl:template name="link">
	<xsl:param name="text"/>
	<xsl:param name="view"/>
	<xsl:param name="param"/>
	<xsl:choose>
		<xsl:when test="$viewmethod = 'js'">
			<a>
				<xsl:attribute name="href">
javascript:match('<xsl:value-of select="$view"/>','<xsl:value-of select="$param"/>');
				</xsl:attribute>
				<xsl:value-of select="$text"/>
			</a>
		</xsl:when>
	</xsl:choose>
</xsl:template>


This is the javascript file that is automatically recalled by all the 
pages generated by the
template (with a <script> tag, omitted here):


>> nm.js

function match(view, param) {
	var params = param.split("&");
	var product;
	for (var i=0; i<params.length; i++) {
		if (params[i].split("=")[0]=="product") {
			product=params[i].split("=")[1];
			params.splice(i,1);
			i--;
		}
	}
	var xslt = new ActiveXObject("Msxml2.XSLTemplate");
	var xslDoc = new ActiveXObject("Msxml2.FreeThreadedDOMDocument");
	var xslProc;
	xslDoc.async = false;
	xslDoc.resolveExternals = false;
	xslDoc.load(view+".xsl");
    	xslt.stylesheet = xslDoc;
    	var xmlDoc = new ActiveXObject("Msxml2.DOMDocument");
    	xmlDoc.async = false;
    	xmlDoc.resolveExternals = false;
    	xmlDoc.load(product+".xml");
    	xslProc = xslt.createProcessor();
    	xslProc.input = xmlDoc;
	xslProc.addParameter("viewmethod","js");
	for (var i=0; i<params.length; i++) {
		xslProc.addParameter(params[i].split("=")[0],params[i].split("=")[1]);
	}
    	xslProc.transform();
    	document.write(xslProc.output);
}


Looks like the generated page ignores the parameters. I've verified that the function reads
correctly parameters names and values from the "param" string; I've also verified that typing
manually something like

	xslProc.addParameter("page","4");

unexpectedly works. This looks rally weird to me! Anybody has any idea what happens inside the IE
javascript interpreter?
Thanks

Davide Girlando


	

	
		
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