是parent
<input id=aa value='aa'>
<iframe src="1.htm"></iframe>in 1.htm
<input type=button onclick="parent.document.all.aa.value='sdfdsagsadfg'">

解决方案 »

  1.   

    <script language="javascript">
    function OpenWin()
    {
    var win1;
    win1 = window.open ("blank","childwin","width=150,height=100");
    win1.document.write ('<input type="button" value="ctlParent" onclick="javascript:opener.document.all.mpInput.value=\'hello world!\'">');
    win1.document.write ('<input type="button" value="Close" onclick="javascript:window.close()">');
    }
    </script><input type="text" name="mpInput">
    <input type="button" value="Open" onclick="OpenWin()">