Flex TextInput 动态推断输入内容

<?

xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
			   xmlns:s="library://ns.adobe.com/flex/spark"
			   xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
	<fx:Script>
		<![CDATA[
			import spark.events.TextOperationEvent;
			[Bindable]
			private var errorStr:String = "";
			protected function numInput_changeHandler(event:TextOperationEvent):void
			{
				var exp:RegExp= /[\d，,]/g;

				var inputText:String = numInput.text+'';
				if(inputText==''){
					return;
				}
				if(inputText.match(/[。,]$/)){
					inputText = inputText.substring(0,inputText.length-1);
				}
				var temp:String = inputText.replace(exp,'');
				var isRight:Boolean = true;
				if(temp==''){
					var arr:Array = inputText.split(/[，,]/);
					for(var i:int =0;i<arr.length;i++){
						var oneNum:String = arr[i];
						if(oneNum==null || (oneNum+'')== ''){
							isRight = false;
						}
					}
				}else{
					isRight = false;
				}
				if(isRight){
					numInput.setStyle('borderColor','black');
					alarmLabel.visible = false;
				}else{
					numInput.setStyle('borderColor','0xFF0000');
					alarmLabel.visible = true;
				}
			}
		]]>
	</fx:Script>
	<fx:Declarations>
	</fx:Declarations>
	<s:HGroup width="100%" height="30" horizontalAlign="left" paddingLeft="5"
			  paddingRight="5" verticalAlign="middle">
		<s:Label width="60" text="号码：" textAlign="right"/>
		<s:TextInput id="numInput" width="200" change="numInput_changeHandler(event)"
					 errorString="{errorStr}"/>
		<s:Spacer width="16"/>
		<s:Label id="alarmLabel" visible="false" color="0xFF0000" text="仅仅同意输入数字以“，”隔开"/>
	</s:HGroup>
</s:Application>