/* mainNav */

#mainNav {

height:31px; /****一级栏目高度****/

text-align:center;

position:absolute;

bottom:0;

left:250px;

}

.ddsmoothmenu {

font: normal 12px Verdana;

width: 745px;

}

.ddsmoothmenu ul {

z-index:100;

margin: 0;

padding: 0;

list-style-type: none;

}

/*顶级菜单项*/

.ddsmoothmenu ul li {

position: relative;

display: inline;

float: left;

padding-left:5px;

border-left:solid 1px #ddd;

}

.ddsmoothmenu ul li a {

display: block;

width:90px;

line-height:31px;/****改为跟一级栏目高度同样的数值****/

background:url(mainNavBg.gif) no-repeat 0 0;/****一级栏目间隔线背景****/

text-decoration: none;

text-align:left;

font-weight:bold;

}

* html .ddsmoothmenu ul li a {

display: inline-block;

}

.ddsmoothmenu ul li a:link, .ddsmoothmenu ul li a:visited {

}

.ddsmoothmenu ul li a:hover {

background-position:0 -31px;

}

/*子级菜单*/

.ddsmoothmenu ul li ul {

position: absolute;

left: 0;

display: none;

visibility: hidden;

}

.ddsmoothmenu ul li ul li {

display: list-item;

float: none;

border:none;

padding:0;

}

.ddsmoothmenu ul li ul li ul {

top: 0;

}

.ddsmoothmenu ul li ul li a {

background: #ddd;/****子级菜单背景****/

font: normal 12px Verdana;

padding:1px 16px;/****子级菜单内间距****/

width: 120px; /****子级菜单宽度****/

line-height:22px;/****子级菜单高度****/

margin: 0;

border: 1px solid #fff;/****子级菜单边框线****/

border-width:0 0 1px 1px;

filter: Alpha(opacity=80);

-moz-opacity:.80;

opacity:0.80;

}

.ddsmoothmenu ul li ul li a:hover {

background:#fff;/****子级菜单翻转背景****/

}