You’ll just need to look for the ID and CLASS hooks, and then use those to create background images.
For example, your invalid email error is in
Code:
p#contact_results.error
The problem is that the text inside of that error might change. I saw it once as "Invalid Email". If it has any other errors with the same hook, you’d have to edit the Javascript to be different.
If you only have "invalid email" in this error field, this could work
Code:
p#contact_results.error {
background: url(‘folder/image.jpg’) no-repeat;
text-indent: -1000px;
height: 60px; /* height of the image*/
}