【求看】下拉选项选不中

<tr> 
      <td width="45%" height="30"> <div align="right">选择批次：</div></td>
      <td width="55%"><select name="BH" id="BH" onChange="window.open(this.options[this.selectedIndex].value,'_parent')">
          <option value="">==选择批次==</option>
          <%do while not rs.eof%>
          <option value="<%=myself&"?BH="&rs(0)%>" selected ><%=rs(1)%></option>

      <%rs.movenext
  loop%>
        </select></td>
    </tr>