2015-07-20 19 views

回答

4

CSS:

ul>li>ul { 
    display: none; 
} 

JS/jquery的

$('li').click(function(e){ 
    e.stopPropagation(); 
    if(this.getElementsByTagName("ul")[0].style.display =="block") 
     $(this).find("ul").slideUp(); 
    else 
     $(this).children(":first").slideDown(); 
}); 

jfiddle