Sort XML Data from a Dropdownlist

[cassim]

Hi,

I am trying to sort data from an XMLfile, but the user needs to select the sort type from a dropdown list. Is this possible?

eg in this XML file I would want a dropdown list where it can be sorted via Title, Author, Number.

<xsl:sort select="bookaut hor"/> will only do one element.
Can "select = " be a variable based on the selection of the dropdown list

<book> 
<booktitle> Book 1</booktitle>
<bookauthor> A</bookauthor> 
<booknumber> 123 </booknumber> 
</book> 

<book> 
<booktitle> Book 2</booktitle> 
<bookauthor>B</bookauthor> 
<booknumber> 786</booknumber> 
</book> 

<book> 
<booktitle> Book 3</booktitle> 
<bookauthor> C</bookauthor> 
<booknumber> 456 </booknumber> 
</book>

Appreciate any assistance.
thank you.