老师，它这里为什么说我的dropdown不是函数
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<title>慕淘网</title>
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<body>
<div class="nav-site">
<div class="container">
<ul class="fl">
<li class="fl"><a href="javascript:;" id="nav-site-signin" class="nav-site-login">亲，请登录</a></li>
<li class="fl"><a href="javascript:;" id="nav-site-signup" class="nav-site-signup link transition">免费注册</a></li>
<li class="fl"><a href="###" target="_blank" class="nav-site-mobile link">手机逛慕淘</a></li>
</ul>
<ul class="fr">
<li class="menu dropdown fl" data-active="menu">
<a href="###" target="_blank" class="dropdown-toggle link transition">我的慕淘<i class="dropdown-arrow"></i></a>
<ul class="dropdown-layer dropdown-left">
<li><a href="###" target="_blank" class="menu-item">已买到的宝贝</a></li>
<li><a href="###" target="_blank" class="menu-item">我的足迹</a></li>
</ul>
</li>
<li class="menu dropdown fl" data-active="menu">
<a href="###" target="_blank" class="dropdown-toggle link transition">收藏夹<i class="dropdown-arrow"></i></a>
<ul class="dropdown-layer dropdown-left">
<li><a href="###" target="_blank" class="menu-item">收藏的宝贝</a></li>
<li><a href="###" target="_blank" class="menu-item">收藏的店铺</a></li>
</ul>
</li>
<li class="fl">
<a href="###" target="_blank" class="nav-site-category link transition">商品分类</a>
</li>
<li class="menu dropdown fl" data-active="menu" data-load="dropdown-seller.json">
<a href="###" target="_blank" class="dropdown-toggle link transition">卖家中心<i class="dropdown-arrow icon transition"></i></a>
<ul class="dropdown-layer dropdown-left">
<li class="dropdown-loading"></li>
<!-- <li><a href="###" target="_blank" class="menu-item">免费开店</a></li>
<li><a href="###" target="_blank" class="menu-item">已卖出的宝贝</a></li>
<li><a href="###" target="_blank" class="menu-item">出售中的宝贝</a></li>
<li><a href="###" target="_blank" class="menu-item">卖家服务市场</a></li>
<li><a href="###" target="_blank" class="menu-item">卖家培训中心</a></li>
<li><a href="###" target="_blank" class="menu-item">体验中心</a></li> -->
</ul>
</li>
<li class="nav-site-service menu dropdown fl" data-active="menu">
<a href="###" target="_blank" class="dropdown-toggle link transition">联系客服<i class="dropdown-arrow"></i></a>
<ul class="dropdown-layer dropdown-right">
<li><a href="###" target="_blank" class="menu-item">消费者客服</a></li>
<li><a href="###" target="_blank" class="menu-item">卖家客服</a></li>
</ul>
</li>
</ul>
</div>
</div>
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<script>
// window.jQuery||document.write('<script src="jquery.js"><'+'/script>')
window.jQuery||document.write('<script src="jquery.js"><\/script>');
</script>
<script src="transition.js"></script>
<script src="showHide.js"></script>
<script src="js.js"></script>
<script src="dropdown.js"></script>
</body>
</html>// $('.dropdown').hover(function(){
// var $dropdown=$(this);
// $dropdown.find('.dropdown-toggle').css({
// 'background-color':'#fff',
// 'border-color':'#cdd0d4'
// });
// $dropdown.find('.dropdown-arrow').css({
// 'background-image':'url(img/dropdown-arrow-active.png)'
// });
// $dropdown.find('.dropdown-layer').show();
// },function(){
// var $dropdown=$(this);
// $dropdown.find('.dropdown-toggle').css({
// 'background-color':'',
// 'border-color':'#f3f5f7'
// });
// $dropdown.find('.dropdown-arrow').css({
// 'background-image':'url(img/dropdown-arrow.png)'
// });
// $dropdown.find('.dropdown-layer').hide();
// })
// $('.dropdown').hover(function(){
// $(this).addClass('dropdown-active');
// },function(){
// $(this).removeClass('dropdown-active');
// })
$('.dropdown').on('dropdown-show',function(e){
var $this=$(this),
dataLoad=$this.data('load');
if(!dataLoad) return;
if(!$this.data('loaded')){
var $layer=$(this).find('.dropdown-layer'),
html='';
$.getJSON(dataLoad,function(data){
//在本地上获取很快
// for(var i=0;i<data.length;i++){
// html+='<li><a href="'+data[i].url+'" target="_blank" class="menu-item">'+data[i].name+'</a></li>'
// }
// $layer.html(html);
//现在来延迟
setTimeout(function(){
for(var i=0;i<data.length;i++){
html+='<li><a href="'+data[i].url+'" target="_blank" class="menu-item">'+data[i].name+'</a></li>'
}
$layer.html(html);
$this.data('loaded',true);
},1000);
});
}
});
$('.dropdown').dropdown({
css3:true,
js:false
});7
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