function tryGm(a, b) {
	if (b) {
		if (a.value == Gm) {
			a.value = '';
			a.style.color = "#000";
		}
	} else {
		if (a.value.replace(' ', '') == '') {
			a.value = Gm;
			a.style.color = "#888888";
		}
	}
}