Help0

HTML

<div id="nav">blabla
</div>
<div class="content">click me</div>

CSS

div#nav {
    display: none;
    float:left;
    padding: 5px; 
    background: #5681b4;
    width: 100px;
    height: 100%;
}
.content {
    margin-left: 5px;
    float:left;
}

JavaScript

$(".content").bind("click", function(){
    $("#nav").toggle("slow");
});