a标签使用前格式化

???

a {
    outline: none;
    color: inherit;
}

a:link {
    text-decoration: none;
    color: inherit;
}

a:visited {
    text-decoration: none;
    color: inherit;
}

a:hover {
    text-decoration: none;
    color: inherit;
}

a:active {
    star: expression(this.onFocus=this.blur());
    text-decoration: none;
    color: inherit;
}

a:focus {
    outline: 0;
    color: inherit;
    text-decoration: none;
}