JS PHPの複数選択の削除

if("确认删除"){

$num=$_POST['checkbox'];

foreach($num as $v){

 $ sql="delete from aa where id =".$v;
 $aa=mysql_query($sql);
 echo "";
 }
 }
?>


<script></li>
<li>var checkflag = "false";</li>
<li>function check(fieldName) {</li>
<li> var field=document.getElementsByName(fieldName) ;</li>
<li> if (checkflag == "false") {</li>
<li> for (i = 0; i < field.length; i++) {</li>
<li> field[i].checked = true;</li>
<li> }</li>
<li> checkflag = "true";</li>
<li> return "全选";</li>
<li> </li>
<li>}else {</li>
<li> for (i = 0; i <field.length i> field[i].checked = false; }<li> checkflag = "false";</li>
<li> return "全选"; </li>
<li> }</li>
<li>}</li>
<li></script>