Starts-with not working with numbers

Hello,

I have an XML file of city, state and ZIP codes, and an HTML form where the 
user can input a full or partial ZIP code (param1). I'm trying to use <choose> 
to return a list of matching ZIP codes.

The first "when" section checks to see if any ZIP_CD is an exact match for 
param1. It works fine.

The second "when" section is supposed to check to see if any ZIP_CD *starts 
with* param1. BUT I can't get it to work. Instead, it returns a list of all ZIP 
codes in the file. I wondered if this was because they were numbers, so I tried 
converting them with string(), which didn't work, and then number() (getting 
desperate) which also didn't work. I even tried translate(), translating the 
numbers to letters, but that also didn't work.

The "otherwise" section also fine--if I input a non-existent ZIP code, I get 
the "no matches found" message.

How can I get the second "when" to pull a list of ZIP codes that start with 
param1?

Thanks in advance!

Kathryn

<xsl:choose>
<xsl:when test="//POINT_RECORDS/POINT_REC/ZIP_CD=$param1">

<TABLE border="0" width="90%" style="font-size: 10pt" cellspacing="1" 
cellpadding="1">
<tr>
<th><b>City</b></th>
<th><b>State</b></th>
</tr>

<xsl:for-each select="//POINT_RECORDS/POINT_REC[ZIP_CD=$param1]">
<xsl:sort select="CITY_NM"/>

<tr>
  <td style="font-size:8pt" valign="top">
     <xsl:value-of select="CITY_NM"/>
  </td>

  <td style="font-size:8pt" valign="top">
    <xsl:value-of select="STATE_CD"/>
  </td>
</tr>

</xsl:for-each>

</TABLE>    

</xsl:when>

***** THIS PART DOES NOT WORK*********

<xsl:when test="//POINT_RECORDS/POINT_REC[starts-with(ZIP_CD, $param1)]">

<TABLE border="0" width="90%" style="font-size: 10pt" cellspacing="1" 
cellpadding="1">

<tr>
<th><b>City</b></th>
<th><b>State</b></th>
<th><b>State</b></th>

</tr>

<xsl:for-each select="//POINT_RECORDS/POINT_REC">
<xsl:sort select="ZIP_CD"/>


<tr>
  <td style="font-size:8pt" valign="top">
     <xsl:value-of select="CITY_NM"/>
  </td>

  <td style="font-size:8pt" valign="top">
    <xsl:value-of select="STATE_CD"/>
  </td>

  <td style="font-size:8pt" valign="top">
    <xsl:value-of select="ZIP_CD"/>
  </td>

</tr>

</xsl:for-each>

</TABLE>    

</xsl:when>

<xsl:otherwise>
<p align="center">(No matches found)</p>
</xsl:otherwise>
</xsl:choose>


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