I am not sure what it is, but when you take your mouse pointer and drag it over an image, it may change colors (depending on your browser). This is my logo: Here is what happens when I drag my mouse over my logo (like you would when selecting a bunch of text on a page). See how there is actually light coming in from the right? That's not something that you can normally see. How is this done?
its a simple code in html : it uses the css coding....you can also use a custom javascript to make this effect too.... if u need help u can pm me... just a short tutorial for you: save the two images in our image directory....then if ur website is using css then u have to make changes in that (its a better process) make a div container and name it like "logo" inside div id logo u have to create the mouse effects...u can copy any existing menu effects too then include those images in the css file.... finally write <div id="logo"></div> in the place where your image is present ...... make sure the css has same height/width as the image because if not...the template will look destroyed.....goodluck...