Ability to trigger an ‘on_mouseover’ event when the mouse cursor is on a prim side. Used for example to show a floating text or a chat message to get help. The ‘delay’ parameter allows to set a delay in seconds before to execute the action in the event. The ‘link’ parameter return the link number of the prim when the cursor is. The ‘side’ parameter return the side number of the prim when the cursor is.