IE6 file表单掩藏 服务器无法获取数据

IE6 file表单隐藏 服务器无法获取数据

HTML code

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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>测试</title>
<style type="text/css">

</style>
<script>

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PHP code

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$exName=strrchr($_FILES["j"]["name"],".");
echo "数据为:".$exName;
?>

IE6下点击第一次无反应,第二次传至服务器数据为空

------解决方案--------------------
就应该不可以