templates/themes/look-and-feel - suggestions needed

Hi,

I am using xslt to transform xml into html and other formats for a while on
a project.

The brass now needs a way to easily change the look and feel of the webapp
as pluggable themes. I use a central stylesheet for css bindings, so all xsl
files call on this css file.

What I was thinking of doing was pass a parameter to my xsl files whose
value would be the theme name to use, where theme name would be the
directory where the image files and css files are located. What this would
involve on my part is to manually go to each xsl file and change

<img src="../images/view.gif" title="View"/>

to

<img title="View"><xsl:attribute name="src"><xsl:value-of
select="$theme"/>view.gif</xsl:attribute></img>

where $theme=../images or any theme directory. and is an input parameter to
the stylesheet, provided externally.

I have been searching on the internet all morning trying to see if anyone
has done this. Maybe I was not searching on the right words, but I would
appreciate your thoughts on this as well as links if you know of any.

Thanks.

TP.