Webmastertoolbag Tryit Editor

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.vertical-menu {
  width: 200px;
  height: 150px;
  overflow-y: auto;
}

.vertical-menu a {
  background-color: #eee;
  color: black;
  display: block;
  padding: 12px;
  text-decoration: none;
}

.vertical-menu a:hover {
  background-color: #ccc;
}

.vertical-menu a.active {
  background-color: #04AA6D;
  color: white;
}
</style>
</head>
<body>

<h1>Vertical Scroll Menu</h1>