首先新建一个main.htm页面。你看到有两个javascript 的 funtion, SubFormCallFunction是给子窗体调用的。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Untitled Page</title>

<script type ="text/javascript" >...
function SubFormCallFunction()

...{
alert("ok");
}
function OpenWin()

...{
window.open("Sub.htm","dsfs","menubar=0,location=0,status=no,dialog=yes,modal=yes,scrollbars=0,resizable=1,width=200,height=200");
}
</script>
</head>
<body>
<input id="Button1" type="button" value="open" onclick ="OpenWin()" />
</body>
</html>
2、再新建Sub.htm,这个窗体是给通过Main.html打开的窗体。下面代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Untitled Page</title>

<script type ="text/javascript" >...
function ColseWin()

...{
window.close();
window.opener.SubFormCallFunction();
}
</script>
</head>
<body>
<input id="Button1" type="button" value="close" onclick ="ColseWin()" />
</body>
</html>

留意上面的代码:关键是:
window.opener.SubFormCallFunction();
这句话的意思是调用父窗体的 Funtion,这个方法在firefox和IE都兼容。