Text field with promp msg only when the field is empty

Question

I want to make a TextField with prompt message but The problem with google code was that the prompt msg is shown only when The textField is not clicked, I want to show the prompt msg even when the text field is clicked,when I type a letter inside the textField it vanishes and when i delete all of it, I'll see the prompt msg again and I want to Load the cursur at the text field when the page is loaded, How can I achieve that?

Answer 1

Not working!
One new problem I have confronted, I have edited the htm file with the previously mentioned code, yet, when i started flex again, the code was not there?
Is it a derived file?
If so how can I make permanent changes there?
i used the code:     
private function onLoad(event:Event):void
             focusManager.setFocus(this.textId);           
As using
private function onLoad(event:Event):void
shows the red cross i.e. error at a particular step at the
<mx:Application.......
and the error shows as
Incorrect numbers of arguments. Expected 1.
I guess its a very simple problem yet I don't know why I am getting so complex.
I have faced certainly a nice problem, it sometimes works and sometimes doesnt,
when I run from the flex bulider it works, If I click on the html file it doesn't.. It may happen it wont work again in future.