글쓰기 여분필드 체크박스 사용

<?$sql = " select bo_1 from $g5[board_table] where bo_table = '$bo_table' ";$row = sql_fetch($sql);$arr = explode("|",$row[bo_1]); echo "<div class='catew'>";foreach($arr as $str) {   echo "<li><input type=checkbox name=wr_cate1[] id='$str' value='$str'> <label for='$str'>$str</label></li>";} echo "</div>"; ?>    <script>var f = document.fwrite;var str=",<?=$write[wr_cate1]?>,";for (var i=0; i<f.length; i++) {if (f.elements[i].name == "wr_cate1[]") {if (str.indexOf(','+f.elements[i].value+',')>=0) {f.elements[i].checked = true;}}}</script>

$wr_cate1 = '';foreach($_POST[wr_cate1] as $var) {$wr_cate1.=",$var";}if (strlen($wr_cate1)) $wr_cate1=substr($wr_cate1,1);