Mega Code Archive
Add child and change property when state changed
<![CDATA[
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" verticalAlign="middle">
<mx:states>
<mx:State name="Register">
<mx:AddChild relativeTo="{loginForm}" position="lastChild">
<mx:FormItem id="confirm" label="Confirm:">
<mx:TextInput />
</mx:FormItem>
</mx:AddChild>
<mx:SetProperty target="{loginPanel}" name="title" value="Register" />
<mx:RemoveChild target="{registerLink}" />
<mx:AddChild relativeTo="{spacer1}" position="before">
<mx:LinkButton label="Return to Login" click="currentState=''" />
</mx:AddChild>
</mx:State>
</mx:states>
<mx:Panel id="loginPanel" title="Login" horizontalScrollPolicy="off" verticalScrollPolicy="off">
<mx:Form id="loginForm">
<mx:FormItem label="Username:">
<mx:TextInput />
</mx:FormItem>
<mx:FormItem label="Password:">
<mx:TextInput />
</mx:FormItem>
</mx:Form>
<mx:ControlBar>
<mx:LinkButton id="registerLink" label="Need to Register?" click="currentState='Register'" />
<mx:Spacer width="100%" id="spacer1" />
<mx:Button label="Login" id="loginButton" />
</mx:ControlBar>
</mx:Panel>
</mx:Application>
]]>