Help required on simple validations for Flex Numeric Stepper

Question

Friends,
I need a small help in Flex Numeric Stepper validation.
I have setted a min value to 1 and max value to 10, Now my requirement  is when ever user can enter a value other than the range between 1 - 10,  i want to display an alert saying "please enter the val's between 1 and  10". I want this scenario to be success in all possible event listeners  like Keyboardevents/mouseevents/default numeric stepper events.  Actually i am failing to produce an alert if i typed the value as "0".  Other than this everything is fine.
i am attaching the code as well for reference. i need solution asap.
your help will be appreciated.
Rajesh
private var nsTextInput:Number;
private var nsTextInputOld:Number;
private var ns:NumericStepper = new NumericStepper();
ns.minimum = 1;
ns.maximum = 10;
ns.addEventListener(FlexEvent.CREATION_COMPLETE, creationCompleteNs);               
ns.addEventListener(Event.CHANGE,creationCompleteNs);
addChild(ns);
private function creationCompleteNs(event:FlexEvent):void{
    var textInput:TextInput = event.currentTarget.getChildAt(0) as TextInput;
    textInput.addEventListener(KeyboardEvent.KEY_UP, keyUPTextInput);
    textInput.addEventListener(FocusEvent.FOCUS_OUT, focusOutTextInput);
    textInput.addEventListener(FocusEvent.FOCUS_IN, focusInTextInput);
            private function keyUPTextInput(event:KeyboardEvent):void
                nsTextInput = event.target.text;
            private function focusInTextInput(event:FocusEvent):void
                nsTextInputOld = event.target.text;
            private function focusOutTextInput(event:FocusEvent):void
                if((nsTextInput<ns.minimum || nsTextInput>ns.maximum) && nsTextInput){
                    Alert.show("Please provide values from "+ns.minimum+" to "+ns.maximum+".","Alert!");
                    event.target.value = nsTextInputOld;
                nsTextInput = null;

Answer 1

you may want to take a look at Flex's validator classes
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/validators/NumberVal idator.html