자바스크립트 자료형 맞추기

<script>
function save()
{
	if(!form1.code1.value){
		alert("코드가 없습니다."); 
		form1.code.focus();	return;
	}
 
 
	form2.code2.value=form1.code1.value;
	alert("good");
}
</script>
 
<table border=0 align=center>
<tr><td> 컴퓨터 등록화면 <?php echo $data[0]; ?>
	<form name=form1 action="<?php echo $_SERVER['PHP_SELF'];?>" method="post"> 
 
 
<table border=1 align=center>
	<tr><td> 코드 :<td><input type=num name=code1>		
 
</table>
</form>
<form>
	<input type=hidden name=code2>
 
 
</form>
 
<table border=0 align=center>
	<tr><td><a href="javascript:save()"> 저장하기</a><a href="../admenu.php"> 메뉴로</a>