javascript - jQuery show submenu if parent have been clicked

Question

Could some one please help with code.

I want to show the submenu only when submenu parent is clicked.

HTML

<ul>
<li><a href="#">Item</a></li>
<li><a href="#">Item</a>
    <ul class="sub-menu">
        <li><a href="#">Submenu</a></li>
        <li><a href="#">Submenu</a></li>
    </ul>
</li>
<li><a href="#">Item</a></li>
<li><a href="#">Item</a>
    <ul class="sub-menu">
        <li><a href="#">Submenu</a></li>
        <li><a href="#">Submenu</a></li>
    </ul>
</li>
<li><a href="#">Item</a></li>
</ul>

So if you click on the parent submenu will show.

Here is fiddle link - http://jsfiddle.net/KhNCV/1/

Answer 1

$('.sub-menu').hide();

$("li:has(ul)").click(function(){

$("ul",this).slideDown();
});

http://jsfiddle.net/3nigma/KhNCV/2/

OR

$('.sub-menu').hide();

$("li:has(ul)").click(function(){

$("ul",this).toggle('slow');
});

http://jsfiddle.net/3nigma/KhNCV/4/