function searchTematic() {
	var area = document.form1.area.value;
	var sez = document.form1.sez.value;
	var tematic = document.form1.tematic.value;
	
	if (tematic!="") {
		window.location.href="/html/tematiche.php?area="+area+"&sez="+sez+"&idtema="+tematic;
	}
}