Adding a webfeat search box to a web page

<script language="JavaScript" src="http://wfsearch.webfeat.org/clients/cornellu/js/cornellu.js"></script>
<script language="JavaScript" src="http://wfsearch.webfeat.org/js/wf3library.js"></script>
<script language="JavaScript" src="http://wfsearch.webfeat.org/clients/cornellu/js/cornelluCustom.js"></script>

<script>
function changeCatName() {
 
    var i = document.wfform.Databases.selectedIndex;
                
                var DBCat = document.wfform.Databases[i].id;
var DBCatNew = DBCat.replace(/&/g,'%26');
 
                 document.wfform.catName.value = DBCatNew;
}
</script>
 
<form action="http://wfsearch.webfeat.org/clients/cornellu/cornell_auth.asp" method="get" name="wfform">
<input type="hidden" name="Command" value="Search"> 
<input type="hidden" name="Client_ID" value="cornellu">
<input type="hidden" name="noserial" value="1">
<input type="hidden" value="JS" name="format">
<input type="hidden" value="js" name="rtmpl">
<input type="text" name="wf_term1" id="wf_term1" value="">
<input type="hidden" name="wf_field1" value="wf_keyword">
 
    <input type="hidden" name="catName" value="General">
                <!-- Adding outside field to keep this query separate from ones from main page -->
                <input type="hidden" name="outside" value="YES">
  
      in
 
                  <select name="Databases" id="Databases" onChange="changeCatName()">
      <option value="wf_ebscoxml_aph,wf_artindexretro" id="General">General</option>
                  <option value="wf_ebscoxml_aph,wf_anthroplus" id="Social Sciences and Area Studies">Social Sciences and Area Studies</option>
      <option value="wf_artindexretro" id="Arts %26 Humanities">Arts & Humanities</option>
      </select> 
                  
      <input type="submit" name="Submit" value="Search" class="button" /> 
  </form>