虽然平滑性处理的不好,但非常适合学习 代码如下: <!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01//EN” “http://www.w3.org/TR/html4/strict.dtd”> <html lang=”en”> <head> <meta http-equiv=”Content-Type” content=”text/html;charset=UTF-8′′> <script type=”text/javascript” src=”http://ajax.googleapis.com/ajax/l