css3实现border渐变色

案例1
 .box{
     width: 100px;
     height: 100px;
     border:10px solid #ddd;
     border-image: -webkit-linear-gradient(#ddd,#000) 30 30;
     border-image: -moz-linear-gradient(#ddd,#000) 30 30;
     border-image: linear-gradient(#ddd,#000) 30 30;
}

案例2

.navbox{ border-right: 1px solid;
 　　border-image: -webkit-linear-gradient(#00569D , white , #00569D)1 10 1; /* 控制边框颜色渐变 */
　　border-image: -moz-linear-gradient(#00569D , white , #00569D)1 10 1;
　　border-image: linear-gradient(#00569D , white , #00569D)1 10 1; /* 标准的必须写在最后 */
}