基于jquery实现简单的手风琴特效_jquery

/* CSS Document */
body {
 margin: 0 auto;
 padding: 0 auto;
 font-size: 9pt;
 font-family: 微软雅黑, 宋体, Arial, Helvetica, Verdana, sans-serif;
}
.accordion {
 padding-left: 0px;
}
.accordion li {
 border-top: 1px solid #000;
 list-style-type: none;
}
.titlemenu {
 width: 100%;
 height: 30px;
 background-color: #F2F2F2;
 padding: 5px 0px;
 text-align: left;
 cursor: pointer;
}
.titlemenu img {
 position: relative;
 left: 20px;
 top: 5px;
}
.titlemenu span {
 display: inline-block;
 position: relative;
 left: 40px;
}
.submenu {
 text-align: left;
 width: 100%;
 padding-left: 0px;
}
.submenu li {
 list-style-type: none;
 width: 100%;
}
.submenu li img {
 position: relative;
 left: 20px;
 top: 5px;
}
.submenu li a {
 position: relative;
 left: 40px;
 top: 5px;
 text-decoration: none;
}
.submenu li span {
 display: inline-block;
 height: 30px;
 padding: 5px 0px;
}
.hover {
 background-color: #4A5B79;
}

(function ($) {
 piano = function () {
 _menu ='[{"title":"一级目录","img":"images/cog.png","submenu":[{"title":"二级目录","img":"images/monitor_window_3d.png"},{"title":"二级目录","img":"images/monitor_window_3d.png"},{"title":"二级目录","img":"images/monitor_window_3d.png"}]},{"title":"一级目录","img":"images/cog.png","submenu":[{"title":"二级目录","img":"images/monitor_window_3d.png"},{"title":"二级目录","img":"images/monitor_window_3d.png"},{"id":"4","title":"二级目录","img":"images/monitor_window_3d.png"}]}]';
 return ep = {
 init: function (obj) {
 _menu = eval('(' + _menu + ')');
 var li ="";
 $.each(_menu, function (index, element) {
 li += '
' + element.title + '';
 if(element.submenu!=null)
 {
 li+='';
 $.each(element.submenu, function (ind, ele) {
 li += '
' + ele.title + '
';
 });
 li+='';
 }
 li+='';
 });
 obj.append(li);
 }
 }
 }

 $.fn.accordion = function (options) {
 var pia = new piano();
 pia.init($(this));
 return this.each(function () {
 var accs = $(this).children('li');
 accs.each(reset);
 accs.click(onClick);
 var menu_li = $(".submenu").children("li");
 menu_li.each(function (index, element) {
 $(this).mousemove(function (e) {
 $(this).siblings().removeClass("hover");
 $(this).find("a").css("color", "#fff");
 $(this).siblings().find("a").css("color", "#000");
 $(this).addClass("hover");
 });
 });
 });
 }

 function onClick() {
 $(this).siblings('li').find("ul").each(hide);
 $(this).find("ul").slideDown('normal');
 return false;
 }

 function hide() {
 $(this).slideUp('normal');
 }

 function reset() {
 $(this).find("ul").hide();
 }
})(jQuery);