s = m:section(TypedSection, "ntpclient", translate("General"))
s.anonymous = true
+s.addremove = false
-s:option(DummyValue, "_time", translate("ntpc_current")).value = os.date("%c")
-
-s:option(Value, "interval", translate("Update Interval (in s)")).rmempty = true
+s:option(DummyValue, "_time", translate("Current system time")).value = os.date("%c")
+interval = s:option(Value, "interval", translate("Update interval (in seconds)"))
+interval.datatype = "and(uinteger,min(1))"
+interval.rmempty = true
s3 = m:section(TypedSection, "ntpserver", translate("Time Server"))
s3.anonymous = true
s3.template = "cbi/tblsection"
s3:option(Value, "hostname", translate("Hostname"))
-s3:option(Value, "port", translate("Port")).rmempty = true
+port = s3:option(Value, "port", translate("Port"))
+port.datatype = "port"
+port.rmempty = true
-return m
\ No newline at end of file
+return m