list_foot.php 파일을 열어

<select name="research" OnChange="Search(this.value);">
<option value="ssc" <? if($sn=="off" && (($ss=="on" && $sc=="on") || ($ss=="off" && $sc=="off"))) echo "selected"; ?>>전체</option>
<option value="sn" <? if($sn=="on" && $ss=="off" && $sc=="off") echo "selected"; ?>>이름</option>
<option value="ss" <? if($sn=="off" && $ss=="on" && $sc=="off") echo "selected"; ?>>제목</option>
<option value="sc" <? if($sn=="off" && $ss=="off" && $sc=="on") echo "selected"; ?>>내용</option>
</select>

위의 구문을 아래의 구문으로 대체하면 해결 됩니다.

<select onChange="zbSearchSelectOption(this.options[this.selectedIndex].value);">
<?
$ssc = "on";
$sn = "off";
$ss = "off";
$sc = "off";
?>
<script language="javascript">
function zbSearchSelectOption(key) {
search.sn.value = 'off';
search.ss.value = 'off';
search.sc.value = 'off';
search[key].value = 'on';
}
</script>
<option value="ssc" <? if($ssc=="on"?"selected":"")?>>전체</option>
<option value="sn" <?=($sn=="on"?"selected":"")?>>이름</option>
<option value="ss" <?=($ss=="on"?"selected":"")?>>제목</option>
<option value="sc" <?=($sc=="on"?"selected":"")?>>내용</option>
</select>