variable value

question:

This is the part of xsl stylesheet I have been working on
 

<xsl:for-each select="//dmxpsub/services/child::*[name()=$serviceName]/child::*[name()=$attributeName]">
    <!-- content of each attribute -->
    <a style="text-decoration: none; color: #000000 " ><xsl:value-of select="text()"/></a>   </xsl:for-each>

 In my output I want to write the variable value. Writing the variable value to the output is easy just use value of element.  But when I have a line like this :
    <a style="text-decoration: none; color: #000000 " >
how can I replace "alankar" with the variable value (maybe say $serviceName)
I tried doing this

    <a style="text-decoration: none; color: #000000 " $serviceName"/>'')">
but it didn't work anyone has the solution to this ...pls let me know

alankar