【UIUX】書き込んだら自動保存されるjavascriptのフォーム何種類か

同じページ内に、 if( isset($POST["sch_id"]) and isset($POST["law_id"]) ){ $sql = "update camp_gift_list set schedule_id = {$POST['sch_id']} where gift_id = {$POST['law_id']} "; $ret = @pg_query($conn, $sql); }

<form name="sampleform_{$law_id}" action="lawson_gift.php" method="POST">
<input type="text" name="sch_id" value="{$value2}" onchange="submit(this.form)">
<input type="hidden" name="law_id" value={$law_id} >
</form>