firefox/mozilla crash: javascript in XSLT

stekker · May 1st, 2006, 05:04 AM

Hi
I am fairly new to XSLT, if not that new to programming.
I hope that I will find some answers to my questions
on this forum, and that you dont mind answering newby questions.

My question to start off with, is this.
I am trying to create variables using javascript, and accessing
them in my XSLT stylesheet.
The XSLT styelsheet below works in Internet Explorer, but makes
Mozilla and Firefox crash. Why, and how can I achieve a similar effect in Mozilla and Firefox?

<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <xsl:template match="/">
    <html>
        <head>
        <title></title>
        <link rel="stylesheet" href="basic.css"/>
        <script language="Javascript" type="text/javascript">

    var counter = 1;

     </script>

        </head>

        <body>

        <xsl:apply-templates/>

        </body>

    </html>
</xsl:template>

<xsl:template match="//heading">
<h1>
<xsl:apply-templates select="text()"/>
</h1>

<script language="Javascript" type="text/javascript">

document.write(counter);

</script>

</xsl:template>

</xsl:stylesheet>

mhkay · May 1st, 2006, 06:08 AM

I've no idea why Firefox should crash, but I think you've got the wrong end of the stick about the relationship between XSLT and Javascript.

Your XSLT is creating an HTML page, which happens to contain some Javascript. When it's finished creating the HTML page, the page can be loaded and that might cause the Javascript to execute. There's no possibility of the Javascript creating variables that the XSLT can access, because the Javascript doesn't start executing until the XSLT has finished.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

stekker · May 1st, 2006, 10:34 AM

No - sure - I know this.

What I am really working at is a situation where I can switch the stylesheets that are associated with an xml page. I have a .htm page with some javascript. The script creates a XSLT processor object and several Document Objects. It associates an xml file and an xslt file with a specific document object, so the information in the xml page is displayed in a particular way. A viewer can click on a button in the .htm page which via a reset() function re-assigns the stylesheet that is associated with the xml document. So the information is displayed in a different way, according to the new stylesheet that is now loaded.

This is good as far as it goes, but I would like to be able to put conditional statements in my XSLT stylesheets so that the information can be displayed in even more varieties of ways, depending what button the viewer has clicked on. i was hoping it would be possible to set a variable in the original htm page to a certain value via javascript, and to let an XSLT template show or not show information, depending on the value of the variable. I thought this might work as each time a new stylesheet loads, the button that loads it could also reset the value of the variable.

stekker · May 1st, 2006, 10:43 AM

Sorry - I am sure the above makes little sense. You can see it at
http://www.metroweb.co.za/~bmstekker/notes.htm
http://www.metroweb.co.za/~bmstekker/notes.xml

Or the whole lot at http://www.metroweb.co.za/~bmstekker/script.zip

Ultimately I want to have the .xslt stylsheets show or hide parts of the xml document, depending on which button the viewer has clicked.

toddiuszho · May 3rd, 2006, 04:15 PM

Can your XSLTProcessor object accept key/value pairs for global stylesheet params before calling transformToDocument()?

If so, use JavaScript to bridge the HTML DOM and UI events to the XSLT stylesheet.