XML Function Call - Help

Hi

I need some help getting across the line calling a function in XSLT ...

Now i am using

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

i.e. v1 but can use if v2 if needed.

I was looking for a "pad left" function but did not find an inbuilt one but  found code on google

<!-- At end of XSLT - tried both before and after closing stylesheet
-->
<xsl:function name="functx:pad-string-to-length" as="xs:string" xmlns:functx="http://www.functx.com" ><xsl:param name="stringToPad" as="xs:string?"/><xsl:param name="length" as="xs:integer"/><xsl:sequence select="substring(string-join (($stringToPad, for $i in (1 to $length) return ' ') ,'') ,1,$length)"/></xsl:function>

I tried with this before and after the ending </xsl:stylesheet> but no joy

<xsl:value-of select="functx:pad-string-to-length(<xsl:value-of select="@outcome" />,  10)" />

i.e. i want to get the value from XML and blank fill to X chars the field value.

<xsl:value-of select="@outcome" /> in the line before this works, however i don't think i have the syntax right,

or the format for the function correct.

>> Tips ?

Thanks