右下角消息框-类似QQ空间右下角的那个。固定在右下角，不随滚动条滚动，也不会跳动。兼容IE6、IE7、FF等主流浏览器。-Lower right corner of message box- similar to the lower right corner of the QQ space. Fixed in the lower right corner, do not scroll with the scroll bar will not beat. Compatible IE6, IE7, FF and other mainstream browsers.