Alert Alternative to pass vales to alert in mobile app

Question

So, I'm converting one of my Flex 4 apps to Flex 4.5 mobile, and I understand Alert shouldn't be used. I looked at Tour de Flex,a nd they have a neat way of making an Alert, but I need to pass a function name and a value which are used. depending on if the user presses 'OK', or 'CAncel'. I pass a function name because the method I'm running is used various times. My old alert was as follows.
protected function unSavedAlertCheck(func:Function, current:int):void {
if (bApply.enabled==true) {
  var o:Object = new Object();
  o["func"] = func;
  o["current"] = current;
  var alert:Alert = Alert.show("You have modified something  and are now navigating away. Doing this will not save the changes you made. Are you sure you want to navigate away and lose your changes?", "Change made without saving...", mx.controls.Alert.YES | mx.controls.Alert.NO, null, processChange);
  alert.data = o;
} else {
  func(current);
Any help would be great.

Answer 1

This is great! Thanks! The problem I have however is that I can't seem to run any function from inside the mxml declared component.
<s:Button label="Save" click="outerDocument.sendUpdate()"/>
Used to be very valid in 4.0 from within the fx:Component, now it doe snot work. (Incidently the sendUpdate is public).
<fx:Component className="AlertMsg">
   <s:SkinnablePopUpContainer x="50" y="240">
    <s:TitleWindow title="Change made without saving" close="close()">
     <s:VGroup horizontalAlign="center" paddingTop="8" paddingBottom="8" paddingLeft="8" paddingRight="8" gap="5" width="100%">
      <s:Label text="Lose Changes?" />
       <s:Button label="Save" click="outerDocument.sendUpdate()"/>
       <s:Button label="Don't Save" click="close();"/>
      </s:HGroup>
     </s:VGroup>
    </s:TitleWindow>
   </s:SkinnablePopUpContainer>
  </fx:Component>
Boy. a Simple Alert box has gotten really hard with spark.
Any ideas?