[xsl] Placing selective links in output

["james walker" <jameswalkerandy@xxxxxxxxxxx>]

I have a set of links a,b,c,d,e,f,g,........z at the top of my page and only 
wanted to put an <a href> tag around a letter within this list if there is a 
document in the list which starts with that letter. Is there any short way 
of doing this so i dont have to do an if staement for each letter? ( i have 
already grouped documents according to first letter).
For example, i would like b to have <a href="#b">b</a> if there is one or 
more docs starting with b (@title is being looked-- substring(@title,1,1))

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