netscape vs internet explorer

Hi,

I would like to check in my XSL if the client is a nn or a msie user...

Depending on that, the user should see another <table><tr><td></td></tr></table> all the rest in the page is the same...

how can i check that in XSL ? if not i can give it with a parameter to the xsl, but then i have following problem : 
<xsl:variable name="spatielijn">
	<xsl:choose>
		<xsl:when test="string-length($spatie)=2"> 
			&#160; <!-- this is only when it is a nn user!) as i send or "NN" (2) or "MSIE" (4)
		</xsl:when>
	</xsl:choose>
</xsl:variable>

Now, how can i do something as :

if (spatielijn.equals("&#160")) {
	out.println("Netscape");
} else {
	out.println("MSIE");
}

but then in xsl format ?

Thanks in advance,
Fred.

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