# Button.onKeyUp

#### Availability

Flash Player 6.

#### Usage

    my_btn.onKeyUp

#### Parameters

None.

#### Returns

Nothing.

#### Description

Event handler; invoked when a button has input focus and a key is released. The `onKeyUp` event handler is invoked with no parameters. You can use Key.getAscii() and Key.getCode() to determine which key was pressed.

You must define a function that executes when the event handler is invoked.

#### Example

The following example defines a function for the `onKeyPress` handler that sends a `trace` action to the Output window:

    my_btn.onKeyUp = function () {
    	trace ("onKeyUp called");
    };