/* This function trim a generic string */
function trim(stringa) {
	while (stringa.substring(0,1) == ' ') {
		stringa = stringa.substring(1, stringa.length);
	}

	while (stringa.substring(stringa.length-1, stringa.length) == ' ') {
		stringa = stringa.substring(0,stringa.length-1);
	}

	return stringa;
}