reading XML CDATA using W3C dom

Hi,

Does anyone know how to extract CDATA sections from an XML file using javascript and W3C dom? I cannot read the text that it stored between tags it keeps giving me an undefined object error.
For example:
my XML fie looks like

<vehicle_db>
      <vehicle ID="760KRT">
            <manufacturer>Honda</manufacturer>
            <model>Civic</model>
            <category>Sedan</category>
            <trim>EX-S</trim>
            <colour>Mettalic Blue</colour>
            <year>2003</year>
            <price>16600</price>
            <transmission>Automatic</transmission>
            <condition>New</condition>
            <odometer>0</odometer>
            <options>
                  <option>
                        <o_name>6 CD Changer</o_name>
                        <o_price>350</o_price>
                  </option>      
                  <option>
                        <o_name>Leather Seats</o_name>
                        <o_price>700</o_price>
                  </option>
                  <option>
                        <o_name>Fog Lights</o_name>
                        <o_price>200</o_price>
                  </option>
            </options>
            <picture>
                  <thumb>pictures/t_civic.jpg</thumb>
                  <full>pictures/f_civic.jpg</full>
            </picture>
      </vehicle>

      <vehicle ID="320FTN">
            <manufacturer>Honda</manufacturer>
            <model>Accord</model>
            <category>Sedan</category>
            <trim>LX</trim>
            <colour>Silver</colour>
            <year>1999</year>
            <price>17000</price>
            <transmission>Automatic</transmission>
            <condition>Used</condition>
            <odometer>17800</odometer>
            <picture>
                  <thumb>pictures/t_old_silver_accord.jpg</thumb>
                  <full>pictures/f_old_silver_accord.jpg</full>
            </picture>
      </vehicle>

Im trying to write a search function to search these fields. So lets say I wanted  the see the model for the first vehcile (want it to return Civic)? How would I do that?
My code right now is

<script type="text/javascript">
                  
                  function search()
                  {
                        topHandle = document.getElementsByTagName("vehicle_db");
                  
                        veh = topHandle.item(0);
                        
                        vehElements = veh.getElementsByTagName("vehicle");
                  
                        firstVe = vehElements.item(0);
                  
                        model = firstVe.getElementsByTagName("model");
                  
                                 //How to read the text (CDATA) within the model tags? (i.e. civic)
                        document.write(model1);

                        return;

}


I tried model.getValue but that didnt work.
model.text failed too, I cannot use the microsoft DOM, it has to be done using W3C with mozilla 1.4 as the reference browser.

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