简单的jquery左侧导航栏和页面选中效果_jquery

/* reset */
body{margin:0;padding:0 0 12px 0;font-size:12px;line-height:22px;font-family:"\5b8b\4f53","Arial Narrow";background:#fff;}
form,ul,li,p,h1,h2,h3,h4,h5,h6{margin:0;padding:0;}
input,select{font-size:12px;line-height:16px;}
img{border:0;}
ul,li{list-style-type:none;}
a {color:#00007F;text-decoration:none;}
a:hover {color:#bd0a01;text-decoration:underline;}

.box {
width: 150px;
margin: 0 auto;
}
.menu{
overflow:hidden;
border-color: #C4D5DF;
border-style: solid;
border-width: 0 1px 1px;
}
/* lv1 */
.menu li.level1 a{
display: block;
height: 28px;
line-height: 28px;
background:#EBF3F8;
font-weight:700;
color: #5893B7;
text-indent: 14px;
border-top: 1px solid #C4D5DF;
}
.menu li.level1 a:hover{text-decoration:none;}
.menu li.level1 a.current{background:#B1D7EF;}
/* lv2 */
.menu li ul{overflow:hidden;}
.menu li ul.level2{display:none;}
.menu li ul.level2 li a{
display: block;
height: 28px;
line-height: 28px;
background:#ffffff;
font-weight:400;
color: #42556B;
text-indent: 18px;
border-top: 0px solid #ffffff;
overflow: hidden;
}
.menu li ul.level2 li a:hover{
color:#f60;
}