高度な CSS スキル_html/css_WEB-ITnose

.nav li:not(:last-child){border-right:1px solid #666;}

IE hack list

selector{    property:value;          /*所有浏览器*/    property:value\9;        /*所有IE浏览器*/    property:value\0;        /*IE8*/    +property:value;         /*IE7*/    _property:value;         /*IE6*/    *property:value;         /*IE6-7*/}