Accessing input element value with XPath in XSLT

I am developing a web application for Firefox that has a button that triggers a client-side XSLT transformation of a DOM document, with a stylesheet obtained via AJAX.

Here's the XHTML part to be converted:

<html>
<head>
    <title>Static Javascript-based XMR Form Creator</title>
</head>
<body>
    <h1 id="title">Static Javascript-based XMR Form Creator</h1>

    <div class="opt_block" id="main_opts">
        Form name <input type="text" id="form_name" />
        Form cols <input type="text" id="form_cols" size="3" maxlength="3" />
    </div>
    <button id="generate">Generate source</button>
    <textarea rows="20" cols="50" id="xmr_source" ></textarea>
</body>

      

        
        
        
      

    

Inside the stylesheet, I want to access the attribute of the value

first input field, with an ID form_name

.

XSLT looks like this:

<xsl:template match="/html/body/div[@id = 'main_opts']" >
    <form>
        <xsl:attribute name="fname">
            <xsl:value-of select="input[@id = 'form_name']/@value" />
        </xsl:attribute>
    </form>
</xsl:template>

      

        
        
        
      

    

I am applying XSLT to the current one document

, for example:

var processor = new XSLTProcessor();
processor.importStylesheet(data); // data received via AJAX request
// document is obviously the object representing the current DOM
var result = processor.transformToDocument(document);

      

        
        
        
      

    

The problem is the XPath that should do the job:

<xsl:value-of select="input[@id = 'form_name']/@value" />

      

        
        
        
      

    

returns nothing, whereas checking the DOM through Firebug shows that the input

element property value

has a value.

Can anyone please help?

EDIT: It is clear that XSLT applies to the current doc