Interactive comparison slider (before and after)

Design details: Need Interactive comparison slider (before and after) with buttons to next comparison and text. something like this http://dev.keypointlearn.com/xcl73_SL2/Wall/V1/story.html but with next and back buttons also It needs to have 5 different transitions sliding to both left and right, sliding up and down and fade effect. images and text to be added by me. Its for anti smoking camping where one side of slider will represent advantages of quitting smoking while other disadvantages of smoking.

this is perfect example, although too advanced I'm looking for something with similar content http://tobaccobody.fi/m_en.php
Ideas for the visual style: Dark
Urls to draw inspiration from: http://tobaccobody.fi/m_en.php
Where the design will be used: web and mobile
Extra notes: dreamweaver