รบกวนหน่อยค่ะ เรื่อง เลอกข้อมูลจาก listbox แล้วให้แสดงรายละเอียดใน textbox

<tr>

        <td colspan="3">
		รหัสสถานศึกษา<input name="school_id" type="text" id="school_id" value="" disabled="disabled" style="width:150px;" />

		สถานศึกษา<select name="school_name" id="school_name" style="width:200px;"  onchange="document.forms[0].school_id.value=this.value">
            <?php
			$sql_nation = " SELECT * FROM AVSREG.SCHOOL left join AVSREG.PROVINCE on AVSREG.SCHOOL.SCHOOLPROVINCEID = AVSREG.PROVINCE.PROVINCEID order by AVSREG.SCHOOL.SCHOOLNAME";
			$result_nation = $pimOracleAPI->OracleExecute($sql_nation);
			
			while($record_nation = oci_fetch_array($result_nation, OCI_ASSOC)) {
				if(trim($record_application['school_name'])==trim($record_nation['SCHOOLNAME'])) {
					echo '<option value="'.$record_nation['SCHOOLID'].'" selected="selected">'.$record_nation['SCHOOLNAME'].'</option>';
				} else {
					echo '<option value="'.$record_nation['SCHOOLID'].'">'.$record_nation['SCHOOLNAME'].'</option>';
				}
			} ?>
          </select>


       จังหวัด <input type="text" id="school_province" name="school_province" value="" style="width:150px;"/>

</td>
      </tr>
  <tr>