I have a Parent Node that represents a Menu and all the childnodes of Menu are "Menu Items". Each Menu Item has 2 properties: 

1) Content Picker (alias is "corCPURL")

2) Textstring (alias is "corURL")

I would to create an xslt macro that gets the value of "corCPURL" if "cpURL" is null or equal to "".

Below is the xslt I have so far any help would be appreciated.

I have a Parent Node that represents a Menu and all the childnodes of Menu are "Menu Items". Each Menu Item has 2 properties: 

1) Content Picker (alias is "corCPURL")

2) Textstring (alias is "corURL")

I would to create an xslt macro that gets the value of "corCPURL" if "cpURL" is null or equal to "".

Below is the xslt I have so far any help would be appreciated.

<xsl:template match="/">

  <!--This gets the ID of the MenuItemContainer-->

<xsl:variable name="id" select="$currentPage/corMenuID" />

<ul>   
<!--- Getting the Menu Items in the Container-->
<xsl:for-each select="umbraco.library:GetXmlNodeById($id)/corMenuItem [@isDoc]">

<!-- Setting variable to get the text value from corURL property --><xsl:variable name="corURLValue" select="umbraco.library:Item($currentPage/@id, 'corURL')" />

    <xsl:choose>

      <!-- if the value of the corCPURL is null or "" output the value of corURL property-->

      <xsl:when test="$corURLValue != ''">

        <li>

          <a href="{corURL}">

            <xsl:value-of select="@nodeName"/>

          </a>

        </li>

      </xsl:when>

      <!-- otherwise output the URL from the content picker corCPURL-->

      <xsl:otherwise>

        <li>

          <a href="umbraco.library:NiceUrl(corCPURL)">

          <xsl:value-of select="@nodeName"/>

          </a>

        </li>

      </xsl:otherwise>

    </xsl:choose>

  </xsl:for-each>

</ul>

</xsl:template>