.btn:focus,
.btn:active:focus,
.btn.active:focus,
.btn.focus,
.btn:active.focus,
.btn.active.focus {
outline: none;
border-color: transparent;
}
解决bootstrap按钮点击后再移入出现蓝色边框
原文：http://www.cnblogs.com/qhhw/p/7131141.html
