导航特效
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<title>jquery导航菜单二级菜单slide滑动渐隐显示</title>
<meta name="description" content="jquery导航菜单制作一个二级菜单导航条，鼠标滑过导航条二级菜单slide滑动展示且带有渐隐效果展示比较柔和的二级菜单目录。jQuery下载" />
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<style type="text/css">
*{margin:0;padding:0;list-style-type:none;}
a,img{border:0;}
a,a:visited{color:#5e5e5e; text-decoration:none;}
a:hover{color:#333;text-decoration:underline;}
body{font:12px/180% Arial,Lucida,Verdana,"宋体",Helvetica,sans-serif;color:#333;background:#fff;}
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.navbox,.nav li,.nav li.current a,.nav li.selected a span,.nav li a.selected,.nav li a.selected span{background:url(images/headerbg.png) no-repeat;}
.navbox{height:39px;background-position:0 -138px;background-repeat:repeat-x;position:relative;z-index:9;}
.nav{width:960px;margin:0 auto;}
.nav li{float:left;height:39px;background-position:100% -99px;padding:0 3px 0 2px;position:relative;}
.nav li.last{background:none;}
.nav li a{float:left;display:block;padding:0 0 0 4px;height:39px;overflow:hidden;}
.nav li a span{float:left;display:block;padding:0 4px 0 0;line-height:39px;font-size:14px;color:#fff;font-weight:800;cursor:pointer;width:142px;text-align:center;}
.nav li.selected a,.nav li a.selected{background-position:0 -60px;text-decoration:none;}
.nav li.selected a span,.nav li a.selected span{background-position:100% -60px;color:#ff7e00;}
.nav li.selected .submenu{display:block;}
.nav li .submenu{display:none;position:absolute;top:39px;left:6px;}
.nav li .submenu{border-style:solid;border-width:0px 1px 1px 1px;border-color:#ddd;padding:0 5px 5px 5px;width:132px;background:#fff;}
.nav li .submenu{-moz-border-radius:0 0 3px 3px;-webkit-border-radius:0 0 3px 3px;border-radius:0 0 3px 3px;-moz-box-shadow:0 5px 5px #D3D3D3;-webkit-box-shadow:0 5px 5px #D3D3D3;box-shadow:0 5px 5px #D3D3D3;}
.nav li .submenu li{float:none;padding:0;background:none;height:auto;border-bottom:dotted 1px #BEBEBE;}
.nav li .submenu li.last{border:none;}
.nav li .submenu li a{float:none;padding:0;text-align:center;height:28px;line-height:28px;background:none;}
.nav li .submenu li a:hover{background:#ddd;font-weight:800;}
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function dropMenu(obj){
$(obj).each(function(){
var theSpan = $(this);
var theMenu = theSpan.find(".submenu");
var tarHeight = theMenu.height();
theMenu.css({height:0,opacity:0});
theSpan.hover(
function(){
$(this).addClass("selected");
theMenu.stop().show().animate({height:tarHeight,opacity:1},400);
},
function(){
$(this).removeClass("selected");
theMenu.stop().animate({height:0,opacity:0},400,function(){
$(this).css({display:"none"});
});
}
);
});
}
$(document).ready(function(){
dropMenu(".drop-menu-effect");
});
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<li><a href="http://www.jsfoot.com/jquery/letter/gd/">jquery文字滚动</a></li>
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