Example 1.
This is when I want to bind activity to one particular event of one display object:

btn.addEventListener(MouseEvent.CLICK, tempfn)
function tempfn(e:Event):void
{
	trace('btn title')
}

Example 2.

If you want to do this for more than one object..

Use a literal function (I think that’s the right term). Any road, in the example below, when the user clicks on ‘btn’, or ‘btn2′, the statements within the function literal tempfn - declared as the function for the event - will fire.

btn.addEventListener(MouseEvent.CLICK, function tempfn(e:Event):void{ trace('btn title') } )
btn2.addEventListener(MouseEvent.CLICK, function tempfn(e:Event):void{ trace('btn2 title') } )

So if you replace the body of tempfn with functions to update a text field or load an image and pass params to these functions like the example below…you have a way of getting events to do bespoke things quickly.

btn.addEventListener(MouseEvent.CLICK, function tempfn(e:Event):void{ updateTf('btn title'), loadImage('imageName.jpg') } )

regBtn.addEventListener(MouseEvent.EXTENDED_CLICK, onReg, “Claire”, false, 0, true);

This apppoach might be a lot of work behind the scenes to setup but thereafter, I could use the EXTENDED_CLICK event whenever I have a button.