How to add alt tags to logo and slider images

[gd4]

Hi,

I have a wordpress site - sorry if this post is not in the right place? Please move if needed - thanks :o

I would like to add alt text to my logo. I have this text in the header php file:


<div id="logo">
<a href="<?php echo home_url('/'); ?>"><img src="<?php header_image(); ?>" width="<?php if(function_exists('get_custom_header')) { echo get_custom_header() -> width;} else { echo HEADER_IMAGE_WIDTH;} ?>" height="<?php if(function_exists('get_custom_header')) { echo get_custom_header() -> height;} else { echo HEADER_IMAGE_HEIGHT;} ?>" alt="<?php bloginfo('name'); ?>" /></a>
</div><!-- end of #logo -->

Second I would like to add alt text to my image sliders (Meteor slides). How do I do this?

My site is ampmgraphics.com

Many thanks for any help :)