Slide Toggle Tab - LTR - Smooth

HTML

<div id='panel'>
    Hi!
</div>
<div id='click'>
</div>

CSS

#panel
{
     height: 500px;
     width: 200px;
     background: black;
     float: left;
     display: none;    
     color: white;
     font-size: xx-large;
}
#click
{
     height: 50px;
     width: 25px;
     background: red;
     float: left; 
     margin-top: 200px;
}

JavaScript

$('#click').click(function()
{
    $("#panel").animate({height:'toggle'},500);       
});