When an image is used as a link, the ALT attribute provides the link text to assistive technology like the JAWS screen reader, and the title attribute can be viewed by the user of a a magnifier. Both are important to convey meaning to people with disabilities.
In the example below, the image is used as a link to a movie clip. When creating link text with an image, imagine you are speaking the link text to a friend over the phone. If the friend can understand the purpose of the link, you have successfully created accessible link text.
Using an image as link text IMG tag.
Using text and an image as a link.
Mobile phone video of recent funeral procession in Jisr al-Shughour
|IE 9||JAWS 12||Yes|
|FF 4||JAWS 12||Yes|
- WCAG 2.0 SC 1.1.1 Non-text Content: All non-text content that is presented to the user has a text alternative that serves the equivalent purpose. (Level A)