勇往直前，学无止尽

效果： tab body { width: 700px; margin: 100px auto 0 auto; font-family: Arial, Helvetica; font-size: small; background-color: #eee; background-image: url(data:image/gi

1.帅气简单的CSS3方法

蚂蚁部落 var userAgent = navigator.userAgent,    rMsie = /(msie\s|trident.*rv:)([\w.]+)/,    rFirefox = /(firefox)\/([\w.]+)/,    rOpera = /(opera).+version\/([\w.]+)/,    rChrome = /(chrome)\/([\w