<script language="javascript">
 function onchange_kind1(value)
 {
   document.frames["frmcontent"].location.replace("kind.jsp?id="+value);
  
      //document.frames[0].href="kind.jsp?id="+value;
   //document.form1.kind.value = value;
  
 }
</script>

<select name="kind1" id="kind1" onChange="onchange_kind1(this.value);">
         <%
         Vector myvector=null;
      myvector=kind1info.selectInfor();
      for(int i=0;i<myvector.size();i++)
      {
        kind1id=((kind1Unit)myvector.elementAt(i)).getID();
        kindname1=((kind1Unit)myvector.elementAt(i)).getKindName1();
      %>
                      <option value="<%=kind1id%>"><%=kindname1%></option>
                      <%
        }//循环结束
      %>
                    </select></td>
                    <td width="81%"><div id="divKind" name="divKind">
                      <select name="kind2" id="kind2">
                      </select>
                    </div>

<iframe id="frmcontent" name="frmcontent" width="400" height="40" src=""></iframe>

第二页面
<div id="divKind" name="divKind">
<select name="kind2" id="kind2" >
      <%
  Vector myvector=null;
  myvector=kind2info.selectInfor(kind1id);
  for(int i=0;i<myvector.size();i++)
     {
   kind2id=((kind2Unit)myvector.elementAt(i)).getID();
   kindname2=((kind2Unit)myvector.elementAt(i)).getKindName2();
  %>
  <option value="<%=kind2id%>"><%=kindname2%></option>
    <%
    }//循环结束
    %>
</select>
</div>

<script language="javascript">
  function getItem()
  {
    //alert(document.form1.kind2.innerHTML);
 //alert(parent.document.form1.kind2.innerHTML);
    parent.document.all.divKind.innerHTML = document.all.divKind.innerHTML;
 //alert(parent.document.form1.kind2.innerHTML); 
 //.innerText
  }
  getItem();
</script>