function search_cell() {
         var sceltaid=document.cellulare.cercacellulare.options[document.cellulare.cercacellulare.selectedIndex].value;
         location.href="cerca_marca.php?idprod="+sceltaid;
}

function del_marca() {
         var sceltaid=document.delmarca.selectmarca.options[document.delmarca.selectmarca.selectedIndex].value;
         location.href="delmarca.php?SID&id="+sceltaid;
}

function mod_prod(typeprod) {
         var sceltaid=document.modifica_prod.prodotto.options[document.modifica_prod.prodotto.selectedIndex].value;
         location.href="modprod.php?SID&idprod="+sceltaid+"&typeprod="+typeprod;
}

function mod_tariffa() {
         var sceltaid=document.modifica_tariffa.tariffa.options[document.modifica_tariffa.tariffa.selectedIndex].value;
         location.href="modtariffe.php?SID&idprod="+sceltaid;
}

function checkemail(email){
	var ret;
	var str=email;
	var filter=/^.+@.+\..{2,3}$/
	if (filter.test(str)){
			ret=true;
	}else{
		alert("Prego inserire un email valida!");
			ret=false;
	};
	return (ret)
};