父页面与子页面间相互传值

1。子页面又父页面通过window.open弹出
子页面要向父页面传值，只要在document前面加window.opener即可。
如：
父页面：

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<script language="javascript">
function tanchu()
{
window.open("Untitled-5.html");   
}
</script>
<body>
    <form id="form1" name="form1" method="post" action="">
        <label> <input type="submit" name="button" id="button" value="提交"
            onclick="tanchu()" />
        </label> <label> <input type="text" name="textfield" id="textfield" />
        </label>
    </form>
</body>
</html>

子页面

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<script language="javascript">
function aaa()
{
 window.opener.document.getElementByIdx('textfield').value='123123123';
}
</script>
<body>
    <form id="form1" name="form1" method="post" action="">
        <label> <input type="submit" name="button" id="button" value="提交"
            onclick="aaa()" />
        </label>
    </form>
</body>
</html>

2。子页面是iframe框架中的页面子页面要向父页面传值，只要在document前面加parent即可。
父页面

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
    <form id="form1" name="form1" method="post" action="">
        <label> <input type="text" name="textfield" id="textfield" />
        </label>
        <iframe id="myiframe" src="Untitled-3.html"></iframe>
    </form>
</body>
</html>

子页面

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<script language="javascript">
function aa()
{ 
var a=parent.document.getElementByIdx('textfield').value;
alert(a); 
}
</script>
<body>
    <form id="form1" name="form1" method="post" action="">
        <label> <input type="submit" name="button" id="button" value="提交"
            onClick="aa()" />
        </label>
    </form>
</body>
</html>