var posX = 0;
 var slideWidth = 680

    
  function openGallery(objWIN) {
    var imgArray = $$('.imgGallery');
      var currentSlide = 1
      var nomberOfSlide = imgArray.length
      var presentationWidth = nomberOfSlide
      if($('imageGalleryContainer')){
       $('imageGalleryContainer').style.width = nomberOfSlide * slideWidth + "px";
       $('totalSlide').innerHTML = nomberOfSlide
        if(Element.getStyle(objWIN, 'display') == 'none'){
          $('currentSlide').innerHTML = 1;
          $('imageGalleryContainer').style.left = "0px";
          posX = 0;
        }
       }
       if(objWIN == 'video' && Element.getStyle(objWIN, 'display') != 'none'){
         $('flashContent').innerHTML = '';
       }else if(objWIN == 'video' && Element.getStyle(objWIN, 'display') == 'none'){
         so.write("flashContent");
       }
       new Effect.toggle(objWIN,"appear");
       return posX
       $('contenuAlpha').style.backgroundImage = "url(../images/bgNoirAlpha.png)";
       $('contenuAlpha').style.border = "1px solid white";
    }     
   function nextSlide(slideContainer) {
           
         
         var nmbOfSlide = parseInt($('totalSlide').innerHTML);
         var currentSlide = parseInt($('currentSlide').innerHTML);
         
         if ( nmbOfSlide > currentSlide ) {
         
         posX = posX + slideWidth
         new Effect.Morph(slideContainer,{ style:'left:-'+ posX + 'px;', duration:0.8, transition: Effect.Transitions.linear });
             $('currentSlide').innerHTML = parseInt(currentSlide) + 1 ;  
        
        }
    
    }
  function previousSlide(slideContainer) {
  
          var currentSlide = $('currentSlide').innerHTML;
          
          
          if ( currentSlide > 1  ) {
          
          if (posX > 0 ) {
          posX = posX - slideWidth;
          }
          else {
           posX = 0;
          }
         new Effect.Morph(slideContainer,{ style:'left:-'+ posX + 'px;', duration:0.8 });
        
            $('currentSlide').innerHTML = parseInt(currentSlide) - 1 ;  
        }
    }