Bu mu istediğin?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>Title</title>
    <script type="text/javascript">
        function pop(action,name) {
            window.open(action, name);
        }
    </script>

</head>
<body>
    <form action="http://www.google.com/" method="post">
        <input type="text" value="val" name="s" />
        <input type="submit" value="Send" onclick="pop('http://www.yahoo.com/','Pop-up');" />
    </form>
</body>
</html>