function one_through_six_only(e, decimal) {
	var key;
	var keychar;
	
	if (window.event) {
	   key = window.event.keyCode;
	}
	else if (e) {
	   key = e.which;
	}
	else {
	   return true;
	}
	keychar = String.fromCharCode(key);

	if ((("123456").indexOf(keychar) > -1)) {
	   return true;
	} else if (key == 48 || key == 8) {
		return true;
	}
	else
	   return false;
}