1.主要是调用父窗口的js函数完成提示
2.target = "hframe" 和 name="hframe"

<form action="server.php" method="post" enctype="multipart/form-data" target="hframe">
        <input type="file" name="myfile" />
        <input type="submit">
    </form>
    <iframe name="hframe" style="display:none;"></iframe> <!--隐藏的iframe-->

    <script type="text/javascript">
        function showMessage(info){
            alert(info);
        }
    </script>

<?php 

var_dump($_FILES['myfile']);

$info = $_FILES['myfile']['name'];

echo "<script>parent.showMessage('".$info."')</script>"; //调用父窗口的js函数完成提示。