An image with an alternate text specified:
The alt attribute is supported in all major browsers.
The required alt attribute specifies an alternate text for an image, if the image cannot be displayed.
The alt attribute provides alternative information for an image if a user for some reason cannot view it (because of slow connection, an error in the src attribute, or if the user uses a screen reader).
Note: Internet Explorer (prior version 9) displays the value of the alt attribute as a tooltip, when mousing over the image. This is NOT the correct behavior, according to the HTML specification.
Tip: To create a tooltip for an image, use the title attribute!
|text||Specifies an alternate text for an image.
Guidelines for the alt text:
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