<html>
<head>
<style>
select {
font: bold 12px Tahoma;
color: DarkBlue;
border: 1px solid LightSteelBlue ;
padding: 2px;
color: DarkSlateGray;
}
option {
padding: 2px;
}
div#btn {
margin-top: 5px;
}
div#btn > input {
background-color: LightGrey ;
border: none;
padding: 2px;
font: bold 12px Arial;
width: 70px;
-moz-border-radius: 5px;
color: white;
}
div#btn > input:hover {
-moz-box-shadow: 0px 0px 2px gray;
cursor: pointer;
}
</style>
</head>
<body>
<select name="husosHorarios" id="husosHorarios">
<option>Alpha Time Zone</option>
<option>Australian Central Daylight Time</option>
<option>Australian Central Standard Time</option>
<option>Atlantic Daylight Time</option>
<option>Australian Eastern Daylight Time or Australian Eastern Summer Time</option>
<option>Australian Eastern Standard Time</option>
<option>Alaska Daylight Time</option>
<option>Alaska Standard Time</option>
<option>Atlantic Standard Time</option>
<option>Australian Western Daylight Time</option>
<option>Australian Western Standard Time</option>
</select>
<div id="btn">
<input type="button" name="bajar" id="bajar" value="Bajar">
<input type="button" name="subir" id="subir" value="Subir">
</div>
</body>
</html>
<script>
// PEGA AQUI EL CODIGO JAVASCRIPT, ASI NO DEPENDES DEL WINDOW.ONLOAD
</script>