javascript完整的下拉菜单代码

这是我开发应用中用到一个js下拉菜单效果，现在发出来希望给更多的朋友帮助。

 

   


   

       
           
       
   

产品类别                                                             <%-- /**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-   /**/--%>                                                                                                                                                                                                     <%-- /**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-   /**/--%>                                                                                                                                                                                                     <%-- /**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-/**/-   /**/--%>                                                                                                                                                                                                                                                         食品加工                                                                                                                                                                                                                                                                                                                                                                                                                                     食品加工1                                                                             食品加工2                                                                             食品加工3                                                                                                                     食品加工类                                                                                                                                                                                                                                                                                                                                                                                                                                     食品加工类1                                                                             食品加工类2                                                                             食品加工类3                                                                                                                     坚果加工类                                                                                                                                                                                                                                                                                                                                                                                                                                     坚果加工类1                                                                             坚果加工类2                                                                             坚果加工类3