请教一下这css样式设置的问题
#divtest .content .divPics ul img
{
border: 5px solid #444;
border-width: 5px;
width: 75px;
height: 75px;
}
#divtest .content .divPics ul a:hover img
{
border: 5px solid #fff;
border-width: 5px;
color: #fff;
}
#divtest .content .divPics ul a:hover
{
color: #fff;
}我想问下都已经设置border: 5px solid #444;为何还要设置border-width呢？
