<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/11/04/detecting-whether-an-image-loaded-successfully-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
		layout="vertical"
		verticalAlign="middle"
		backgroundColor="white" viewSourceURL="srcview/index.html">

	<mx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import flash.events.HTTPStatusEvent;

			private function img_httpStatus(evt:HTTPStatusEvent):void {
				switch (evt.status) {
					case 200:
						// Valid image, do nothing.
						break;
					case 404:
						// Invalid image, PANIC!
						Alert.show("invalid image!", evt.status.toString());
						break;
					default:
						Alert.show(evt.toString(), evt.status.toString());
						break;
				}
			}

			private function button_click(evt:MouseEvent):void {
				img.source = textInput.text;
			}
		]]>
	</mx:Script>

	<mx:ApplicationControlBar dock="true">
		<mx:HDividedBox width="100%">
			<mx:TextInput id="textInput"
					text="http://www.helpexamples.com/flash/images/image1.jpg" />
			<mx:Button label="load image"
					width="100"
					minWidth="100"
					maxWidth="100"
					click="button_click(event);" />
			<mx:Spacer width="100%" />
		</mx:HDividedBox>
	</mx:ApplicationControlBar>

	<mx:Image id="img"
			httpStatus="img_httpStatus(event);" />

</mx:Application>