<select name="select">
<option value="a">a</option>
<option value="b">b</option>
<option value="c">b</option>
</select>
<option value="a">a</option>
<option value="b">b</option>
<option value="c">b</option>
</select>
$v=intval($_POST["select"]);
switch($v)
{
case 1:$vv='a';break;
case 2:$vv='b';break;
case 3:$vv='c';break;
defualt:echo 'skdjf';
}
echo $vv;
?>
<option value="a">a</option>
<option value="b">b</option>
<option value="c">b</option>
</select>
<script language="javascript">
function t(e)
{
switch (e)
{
case "a":
{location.href="网址一";break}
case "n":
{location.href="网址二";break}
case "v":
{location.href="网址三";break}
default:
}
}
</script>
$v=intval($_POST["select"]);
switch($v)
{
case 1:$vv='a';break;
case 2:$vv='b';break;
case 3:$vv='c';break;
defualt:echo 'skdjf';
}
echo $vv;
?>