Originariamente inviato da nephilim89
non funziona!
grazie per la risposta
a me questo funziona correttamente:
codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>senza nome</title>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<meta name="generator" content="Geany 0.18.1" />
</head>
<body>
<form id="idform">
<select onchange="document.getElementById('idselect2').selectedIndex=-1;" id="idselect1">
<option value="01">Valore1</option>
<option value="02">Valore2</option>
</select>
<select onchange="document.getElementById('idselect1').selectedIndex=-1;" id="idselect2">
<option value="03">Valore3</option>
<option value="04">Valore4</option>
</select>
</form>
</body>
</html>
saluti