Hi,can anyone tell me how to add alt for the logo picture?
does title = alt?

<img src="blah.jpg" alt="this image says 'blah'"/>

No, the title attribute is not the same as alt. But, IE has rendered an alt like a title for years, so there is not much more difference nowadays.

Except that braille web browsers use the alt attribute to explain to the blind people what the image should represent, not the title.

The HTML won't validate if your images have a title but no alternative text. The 'alt' text needs to be present for all images that aren't supplied by CSS.

<img src="your image name.jpg" width="150" height="117" alt="logo" />

For this kind of information you can check other site's source. http://www.infysolutions.com