amf1k,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
select{
width: 170px;
font-size: 15px;
}
</style>
</head>
<body>
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
</head>
<body>
<select name="content" onblur="this.options[2]=new Option('Выберите Вариант', '?', true, true);" onfocus="this.options[2]=null">
<option>Вариант 1</option>
<option>Вариант 2</option>
<option disabled="disabled" selected="selected">Выберите Вариант</option>
</select>
</body>
</html>
</body>
</html>