function verifica_la_mela(field,msg) {
	var goodEmail = field.value.search(/^[^\.]*[A-Za-z0-9_\-\.]*[^\.]\@[^\.][A-Za-z0-9_\-\.]+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.int)|(\.org)|(\.info)|(\.biz)|(\.us)|(\.bizz)|(\.coop)|(\..{2,2}))[ ]*$/gi);

	if (goodEmail!=-1) {
	    return true;
	} else {
		alert(msg);
        field.focus();
        field.select();
        return false;
    }
}