Question

Basically I created a dropdown menu with jquery by using the slideUp and slideDown functions. Everything worked good until I figured that if I continue hovering the mouse through the list, the height of the sub button won’t stop. And we can see that by the border-left expanding. Any way to avoid this?

I’ve created a fiddle so that you guys can know what I’m talking about http://jsfiddle.net/WGm8q/

Anyway here’s the code:

JS

$('.button').hover(
    function () {
        $('.sub', this).stop().slideDown(100);
    }, 
    function () {
        $('.sub', this).stop().slideUp(100);
    }
);

CSS

.menu {
    width: 850px;
}
.button .main {
    padding-bottom: 5px;
    cursor: pointer;
}
.button .sub {
    display: none;
    margin-left: 10px;
    padding: 10px 0 10px 0;
    border-left: 1px solid #CCC;
}
.button .sub p {
    background-color: #FFF;
    margin: 0;
    padding-left: 5px;
}

HTML

<div class="menu">
    <div class="button">
        <div class="main">Menu 1</div>
        <div class="sub">                    
            <p>Submenu 1</p>                 
            <p>Submenu 1</p>                 
            <p>Submenu 1</p>                 
            <p>Submenu 1</p>                 
            <p>Submenu 1</p>                 
            <p>Submenu 1</p>                 
            <p>Submenu 1</p>
        </div>
    </div>
</div>

Answer 1

Your Fiddle

Change this:

.button .sub {
display: none;
margin-left: 10px;
padding: 10px 0 10px 0;
border-left: 1px solid #CCC;
}

Into:

.button .sub {
display: none;
margin-left: 10px;
border-left: 1px solid #CCC;
}