Internet Explorer has a habit of wrongly displaying the alt attribute of an image as a tooltip. This can prove irritating when using images as links or when trying to implement an alternative tooltip solution such as Prototip.

There is a simple way to stop IE using the alt attribute as a tooltip:

1. Add a title attribute to your image. The contents of this attribute will be used as a tooltip instead.

A blank title attribute will prevent IE displaying a tooltip at all.