Transition problem between pages: cross browsers problem

Hi - website link is [login to view URL] Each time you press the prec. or suiv. blue link, it takes you to the previous or next ad. The problem is the following: - on firefox: no problem, if you look below the button "Je réagis", the transition between each ad is perfect, very smooth. - on Chrome and IE: problem: if you look below the button "Je réagis", the page loads strangely during half second, just the time for the page to laod: SEE SCREENSHOT. Final result is the same on the three browsers, again, it's just the way it loads. Please when biding come with a solution (js conflict, css...) and not with your portfolio. More jobs to come. Thanks! Karl