[xsl] Default attribute values?

Hi again

I'm trying to add default attribute values to elements, but I get 
errors. Is there a simple way to do it using xpath? What i'm trying is:
<input type="text" value="{un|'Please enter your username'}" />

Is there a simple way of doing this, or do I have to throw an xsl:choose 
inside an xsl:attribute?
--~------------------------------------------------------------------
XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail: <mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--