<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
.a{
width: 600px;
min-height: 50px;
border: 1px solid #CCCCCC;
}
</style>
</head>
<body>
<div class="a" contenteditable="true"></div>
</body>
</html>
