Hola
caritafeliz
Prueba este código:
Código PHP:
<html>
<head>
<script type="text/javascript">
function cambiar(obj) {
for (i=0; ele=obj.form.elements[i]; i++)
if(ele.type=='select-one')
ele.selectedIndex = obj.selectedIndex;
}
</script>
</head>
<body>
<form>
<select onchange="cambiar(this)">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select>
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</form>
</body>
</html>
Saludos,
