Conditional Selection

The code below works, but is too complex, I’d like to simplify it. How can I make the select portion conditional or how can I use a variable in the select?

1. <xsl:choose>
2. <xsl:when test="count(current()/child::* [@isDoc and string(umbracoNaviHide) != '1']) &gt; 0">
3. <xsl:for-each select="$currentPage/self::* [@isDoc and string(umbracoNaviHide) != '1']">
4. <h3>
5. <a href="{umbraco.library:NiceUrl(@id)}">
6. <xsl:value-of select="@nodeName"/>
7. </a>
8. </h3>
9. </xsl:for-each>
10. </xsl:when>
11. <xsl:otherwise>
12. <xsl:for-each select="$currentPage/parent::* [@isDoc and string(umbracoNaviHide) != '1']">
13. <h3>
14. <a href="{umbraco.library:NiceUrl(@id)}">
15. <xsl:value-of select="@nodeName"/>
16. </a>
17. </h3>
18. </xsl:for-each>
19. </xsl:otherwise>
20. </xsl:choose>