链接点击时如何去掉虚框
a {outline: none;}
a:active {star:expression(this.onFocus=this.blur());}
:focus { outline:0; -moz-outline-style: none; } /* for Firefox */
a:active {star:expression(this.onFocus=this.blur());}
:focus { outline:0; -moz-outline-style: none; } /* for Firefox */
