IE六、IE七、Firefox無提示關閉窗口的代碼

IE6:
<script>
window.opener=null;
window.close();
</script>

IE7:
<script>
window.open('','_self');
window.close();
</script>

IE六、IE七、FF通用代碼：
<script>window.opener=null;window.open('','_self');window.close();</script>