This makes your images transparent by default, and when the mouse hovers over them it will make them normal again.
Example:To see an example of what this image code does, hold your mouse over the image below that says "Hover your mouse over me!"

To use this on ALL images (including images that are links), place this code in the "About Me" section of your profile.
To use this code on JUST image links, place this code in the "About Me" section of your profile.