This Extension adds 2 new fields to the Image and Text/w Image Elements. These fields called Alttext and titletext are used to add alt-tags and/or title-tags to the shown images.
The field is splitted with chr(10) ( carrige return ) by default, but this can be changed with a constant.
Each line of the alttext-field go's to the corresponding image from the image-source field.
Read More: http://www.typo3techie.com/typo3-india/portfolio/extensions.html