jQuery实现带动画效果的二级下拉导航方法_jquery

代码如下:








$(function(){
Menu(".nav_list");
});
function Menu(ul_class_name){
Second(".nav_list");
var li_name = ul_class_name+" "+"li";
$("div.second").css("opacity","0.1");
$(li_name).hover(
function(){
var a_height = $(this).children("div.second a:first").css("height");
var a_count = $(this).children("div.second").children("a").length;
var slide_hieght = (parseInt(a_height)+11)*a_count;
$(this).children("div.second").stop().animate({height:slide_hieght+"px",opacity:"0.9"},600);
$(this).children("a:not(.current)").stop().animate({backgroundColor:"#f00",color:"#fff"},800);
},function(){
$(this).children("div.second").stop().animate({height:"0px",opacity:"0.1"},600);
$(this).children("a:not(.current)").stop().animate({backgroundColor:"#996666",color:"#ccc"},800);
});
}
function Second(ul_class_name){
var second_menu = ul_class_name+" "+"li"+" "+"div.second"+" "+">"+" "+"a";
$(second_menu).hover(
function(){
$(this).stop().animate({backgroundColor:"#000",opacity:"1"},400);
},function(){
$(this).stop().animate({backgroundColor:"#666",opacity:"0.9"},400);
});
}