function ReplaceImage(name)
{
  if (name == "synopsis")
  {
    document.images.img_extraitvideo.src="../../images/extrait_video_over.gif";
    document.images.img_synopsis.src="../../images/synopsis_up.gif";
  }
  else
  {
  	document.images.img_extraitvideo.src="../../images/extrait_video_up.gif";
    document.images.img_synopsis.src="../../images/synopsis_over.gif";
  }  
}