HTML advice please

[speckytecky]

In the EduGeek Joomla site I’m trying to develop can someone offer me a clarification on what I need in HTML to alter the News item with grey box gallery pictures please. It’s the Alt bit has me stumped – I think!
current HTML is:

<p align="center"><a href="http://www.edugeek.net/forums/images/stories/gallery/1.jpg" title="Planters" rel="gb_imageset[nice_pics]"><img src="http://www.edugeek.net/forums/images/stories/gallery/1_thumb.jpg" border="0" alt="Blue Hills" title="Blue Hills" align="middle" /> <span style="color: #ffffff;"> </span></a><a href="http://www.edugeek.net/forums/images/stories/gallery/2.jpg" title="Sunset" rel="gb_imageset[nice_pics]"><img src="http://www.edugeek.net/forums/images/stories/gallery/2_thumb.jpg" border="0" alt="Sunset" title="Sunset" align="middle" /> <span style="color: #ffffff;"> </span></a><a href="http://www.edugeek.net/forums/images/stories/gallery/3.jpg" title="Water Lillies" rel="gb_imageset[nice_pics]"><img src="http://www.edugeek.net/forums/images/stories/gallery/3_thumb.jpg" border="0" alt="Flowers" title="Flowers" align="middle" /><span style="color: #ffffff;"> </span></a></p>

I want to change the 3 pictures and have prepared jpgs and thumbnails appropriatley called planting.JPG, planting_thumb.JPG, planters.JPG, planters_thumb.JPG and roofs.JPG, roofs_thumb.JPG.
I can see that I need to alter the current 1.jpg, 1_thumb.jpg etc to my new photos and the title to different from what they are at present Flower planting etc (it's a school Eco project) but what do I change it to where it currently says alt="Blue Hills" – where is it pulling that Alt up from if that makes any sense please?

[rush_tech]

What is in the content article "A News Item With Greybox Gallery" can you post it here?

[fernt]

What's in the alt tags is largely irrelevant. Alt tags are only used to replace the image in the event of it not being loaded or not found, and as mouse over text

For SEO and accessibility purposes, it should be a short description of what that image is. However, you could put any old nonsense between the inverted commas and it wouldn't make a difference as to whether it works or not.

It might be worth removing the alt="blahblah" bits entirely while you're trying to get your head around it.

[speckytecky]

Thanks both for your replies. I think the answers should propell me forward

Content too big to post up here so I'll tinker some more.

[fernt]

Content too big to post up here

Go for it. I don't mind having a quick look through...