帮忙看下这个代码，运行有问题。错误:'Parent' 未定义
想用iframe向主框架的文本框传递文本
<html>
<head>
<title>无标题文档</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFFFFF">
<form name="addform">
<input type="text" name="downfile">
</form>
<iframe name="ad" frameborder=0 width=100% height=25 scrolling=no src=wang.htm></iframe>
</body>
</html>
<html>
<head>
<title>wang.htm</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFFFFF">
<script language=javascript>
<!--
Parent.Document.AddForm.DownFile.Value = "UploadFile"
//-->
</script>
</body>
</html>
