By default when you declare a RadToolTip it is created and added to the DOM where it is actually declared. However, in some cases it should be added as a child of the <form> element. In order to control where the tooltip element is added you can use the RenderInPageRoot property - when it is set to true, the tooltip is added as a child of the root element.
Use the radio buttons to toggle the value of the RenderInPageRoot
property and hover the images to see the result - the tooltips will not be shown because
their direct parents override their visibility and position settings