<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<style type="text/css">
<!--
#list_countries, .list_collapse 
{ 
    position: absolute; 
    background: #A8C5E1; 
    width: 300px; 
    height: 300px; 
    overflow-y: scroll; 
    border: 1px solid #666; 
    z-index: 10; 
    padding: 5px; 
    text-align: left; 
    display:block; 
} 
 
#adv_practices:hover, .list_expand 
{ 
    height: 180px; 
} 
-->
</style>
</head>
<body>

<div id="list_countries" onmouseover="this.className='list_expand';" onmouseout="this.className='list_collapse';">

 asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br /><br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br /><br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />asdasd<br />

</div>

</body>
</html>
bunu html olarak kaydet ve önizleme yap bakalım kaydırma çubuğu var mı.

sonra asdasd<br /> yerlerine kendi kodlarını koy css den renk-boyut vs ayarla.

kolay gelsin.