폼 액션 질문 입니다.

submit 버튼에 onclick 액션을 주지마시고 form 태그에 onsubmit에 하시면 됩니다.

<form name="fwrite" id="fwrite" method="post" onsubmit="return order()">
					<input type="hidden" name="uid" value="<?php echo get_uniqid(); ?>">
					<input type="hidden" name="w" value="<?php echo $w ?>">
					<input type="hidden" name="bo_table" value="tour_order">
					<input type="hidden" name="wr_id" value="<?php echo $wr_id ?>">
				
					<input type="hidden" name="wr_1" value="sub04_1">
					<input type="hidden" name="wr_2" value="<?php echo $wr_id ?>">
					<input type="hidden" name="wr_3" value="<?php echo $view['wr_subject'] ?>">
					<input type="hidden" name="wr_4" value="<?php echo $member['mb_name'] ?>">
					<input type="hidden" name="wr_5" value="<?php echo $member['mb_hp'] ?>">
					<input type="hidden" name="wr_subject" value="<?php echo $member['mb_name'] ?>님 예약">
					<input type="hidden" name="wr_content" value="<?php echo $member['mb_name'] ?>님 예약">
 
					<input type="submit" value="예약하기" id="order_btn" >
 
					</form>
 
<script>
function order()
{
 
 
   if(!confirm("<?php echo $view['wr_subject'] ?>을 예약하시겠습니까?")) {
		return false;
   }
	
	document.fwrite.action = './write_update_order.php';
	document.fwrite.submit();
	
}
 
 
</script>