<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test dropdown</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<select name="dropdownmenu" id="dropdownmenu">
<option value="1">Ena</option>
<option value="2">Dva</option>
<option value="3">Tri</option>
<option value="4">Štiri</option>
<option value="5">Pet</option>
<option selected="selected">Izberi vrednost</option>
</select>
</form>
<p>
<a href="#" onclick="form1.dropdownmenu.value=[1]">Link1</a><br />
<a href="#" onclick="form1.dropdownmenu.value=[5]">Link5</a><br />
<a href="#" onclick="form1.dropdownmenu.value=[3]">Link3</a><br />
</p>
</body>
</html>