Executes the specified actions upon mouseover of the image
defined by the parent <graphical_button name=""> or <image
name=""> tag.
Child of: <graphical_button
name=””>, <image name="">
Parent of: Any child of <node name="">
See also: <mouse_click>,
<mouse_down>, <mouse_move>, <mouse_out>
Example:
<image
name="my_image">
...
<mouse_over>
...
</mouse_over>
</image>