How to post pictures using html
Some basic html tips:
<img src> is the tag to post pictures on CraigsList. An example would be
<img src="http://images.petgalleries.com/files/2/merrychristmas.jpg" alt="merrychristmas.jpg" />
<a href> is the tag to post a link. An example would be
<a href="http://images.petgalleries.com/files/2/merrychristmas.jpg">merrychristmas.jpg</a>
When posting on CL you can also just paste the link http://images.petgalleries.com/files/2/merrychristmas.jpg and CL will automatically link it to your page.
Upload your file. Once it is uploaded all you have to do is copy that information in the "Tag" box. Ex: <img src="http://tinypic.com/yourpic.jpg">
Right click on your image and get the "properties"
In Internet Explorer you will copy the Address (url)

In Firefox you will copy the location
To put my sample picture in CL I will want to put this in my post
<img src="http://images.petgalleries.com/files/2/Waterbw.jpg">
Which will look like
once you submit your post.