很多网站导航条背景色都是通过图象制作软件制作的质感图片实现的，本方法则是通过CSS+javascr ipt实现只须修改网页代码便可改变网站导航条背景色。-Texture images to achieve a lot of website navigation bar background color are produced through the image creation software, this method is implemented by CSS+javascr ipt only need to modify the page code can change the navigation bar background color.