iframe做的图片上传

Question

<input type="hidden" id="a"> 
<iframe name="1" src="c.php?id=a"> 
<input type="hidden" id="b"> 
<iframe name="2" src="c.php?id=b">c.php$id = $_REQUEST['id'];
//javascript 赋值
<script language='javascript'>
window.parent.getElementById('<?=$id?>').value = ???
</script>
 

Answer 1

应该是parent.document.getElementById('<?=$id?>').value = ???

Answer 2

http://hi.baidu.com/lael80/blog/item/764dc909c2d4df83d1581b45.html