http://www.w3schools.com/cssref/pr_pos_overflow.asp
Try it here.
<!DOCTYPE html><html>
<head>
<style>
div.scroll
{
background-color:#00FFFF;
width:100px;
height:100px;
overflow : -moz-scrollbars-vertical;
overflow-x: hidden;
overflow-y: scroll;
} div.hidden
{
background-color:#00FF00;
width:100px;
height:100px;
overflow:hidden;
}
</style>
</head> <body>
<p>The overflow property specifies what to do if the content of an element exceeds the size of the element's box.</p> <p>overflow:scroll</p>
<div class="scroll">You can use the overflow property when you want to have better control of the layout. The default value is visible.</div> <p>overflow:hidden</p>
<div class="hidden">You can use the overflow property when you want to have better control of the layout. The default value is visible.</div>
</body>
</html>