大家好,当访问子菜单时,我如何才能始终li
以背景突出显示父级“”,或者在下拉导航菜单上提供具有 css 某些属性的类?类似的东西将指示它正在导航的菜单的哪个部分,并且该背景始终保持突出显示,直到将更改菜单。
HTML
<ul id="menu">
<li><a href="#">About </a></li>
<li><a href="#">Programmes</a>
<ul class="secondLevel">
<li><a onClick="ajaxCall();" href="">Undergraduate</a></li>
<li><a href="#">Postgraduate</a></li>
</ul>
</li>
<li><a href="#">Academics</a></li>
<li><a href="#">Research</a></li>
<li><a href="#">Facilities</a></li>
</ul>
CSS
#menu, #menu ul {
margin: 0;
padding: 0;
list-style: none;
} #menu {
width: 958px;
/*margin: 60px auto;*/
border: 1px solid #222;
background-color: #111;
background-image: linear-gradient(#444, #111);
box-shadow:
0 1px 1px #777;
} #menu:before, #menu:after {
content: "";
display: table;
} #menu:after {
clear: both;
} #menu {
zoom: 1;
} #menu li {
float: left;
border-right: 1px solid #222;
box-shadow: 1px 0 0 #444;
position: relative;
} #menu a {
float: left;
padding: 11px 40px;
color: #999;
text-transform: uppercase;
text-decoration: none;
text-shadow: 0 1px 0 #000;
} #menu li:hover > a {
color: #fafafa;
} * html #menu li a:hover { /* IE6 only */
color: #fafafa;
} #menu ul {
margin: 20px 0 0 0;
_margin: 0; /*IE6 only*/
opacity: 0;
visibility: hidden;
position: absolute;
top: 38px;
left: 0;
right: -1px;
z-index: 1000000;
background: #444;
background: linear-gradient(#444, #111);
box-shadow:
0 -1px 0 rgba(255, 255, 255, .3);
transition:all
.2s
ease-in-out;
} #menu li:hover > ul {
opacity: 1;
visibility: visible;
margin: 0;
} #menu ul ul {
top: 0;
left: 150px;
margin: 0 0 0 20px;
_margin: 0; /*IE6 only*/
box-shadow: -1px 0 0 rgba(255, 255, 255, .3);
} #menu ul li {
float: none;
display: block;
border: 0;
_line-height: 0; /*IE6 only*/
box-shadow: 0 1px 0 #111, 0 2px 0 #666;
} #menu ul li:last-child {
box-shadow: none;
} #menu ul a {
padding: 10px;
_height: 10px; /*IE6 only*/
display: block;
white-space: nowrap;
float: none;
text-transform: none;
} #menu ul a:hover {
background-color: #000000;
} #menu ul li:first-child > a {
/*border-radius: 3px 3px 0 0;*/
padding: 11px 13px;
} #menu ul li:first-child > a:after {
content: '';
position: absolute;
left: 40px;
top: -6px;
} #menu ul ul li:first-child a:after {
left: -6px;
top: 50%;
margin-top: -6px;
border-left: 0;
} #menu ul li:first-child a:hover:after {
border-bottom-color: #000;
} #menu ul ul li:first-child a:hover:after {
border-right-color: #000;
border-bottom-color: transparent;
} #menu ul li:last-child > a {
/*border-radius: 0 0 3px 3px*/;
padding: 11px 20px;
}