var dom = (document.getElementById)? true:false;
      var ie = (document.all)? true:false;

      function SetToXY(DivId,x,y)
      {
      try
      { 
          if (dom)
              {
              document.getElementById(DivId).style.left = x;
              document.getElementById(DivId).style.top = y;
              }
          if (ie) 
              {
              document.all[DivId].style.posLeft = x;
              document.all[DivId].style.posTop = y;
              }
          }
      catch (Identificateur)
        {
            setTimeout("SetToXY('"+DivId+"','"+x+"','"+y+"');",1000);    
        } 
      }
      // renvoie la largeur du div
      function getWidth(DivId)
        {
        try
          { 
            if (dom){
              return (document.getElementById(DivId).offsetWidth);
              }
            if (ie) 
              {return (document.all[DivId].clientWidth);
                }
            }
        catch (Identificateur)
          {
            setTimeout("getWidth('"+DivId+"');",1000);    
          }
        }
      // gestion du scroll
    var TimerScroll;
    function PosLeftScroll()
      {
      if(document.scrollForm.PosLeftGo.value<=-limite)
        {
            window.clearTimeout(TimerScroll);
        }
      else
        {
        // deplacement
        document.scrollForm.PosLeftGo.value=parseInt(document.scrollForm.PosLeftGo.value)-15;
        SetToXY('ScrollDiv',document.scrollForm.PosLeftGo.value,0);
        TimerScroll=setTimeout("PosLeftScroll()",10);
        }
      }
    function PosRightScroll()
      {
      if(document.scrollForm.PosLeftGo.value==0)
        {
        document.scrollForm.PosLeftGo.value=0;
        SetToXY('ScrollDiv',document.scrollForm.PosLeftGo.value,0);
        TimerScroll=setTimeout("PosRightScroll()",10);
        }
      else
        {
        // deplacement
        document.scrollForm.PosLeftGo.value=parseInt(document.scrollForm.PosLeftGo.value)+15;
        SetToXY('ScrollDiv',document.scrollForm.PosLeftGo.value,0);
        TimerScroll=setTimeout("PosRightScroll()",10);
        }
      }  
    function PoStopScroll()
      {
      if(document.scrollForm.PosLeftGo.value<=-limite)
        {
            window.clearTimeout(TimerScroll);
        }
      else
        {
        // deplacement
        document.scrollForm.PosLeftGo.value=parseInt(document.scrollForm.PosLeftGo.value)-3;
        SetToXY('ScrollDiv',0,document.scrollForm.PosLeftGo.value);
        TimerScroll=setTimeout("PosTopScroll()",20);
        }
      }
    function PosBottomScroll()
      {
      if(document.scrollForm.PosLeftGo.value==0)
        {
        document.scrollForm.PosLeftGo.value=0;
        SetToXY('ScrollDiv',0,document.scrollForm.PosLeftGo.value);
        TimerScroll=setTimeout("PosBottomScroll()",20);
        }
      else
        {
        // deplacement
        document.scrollForm.PosLeftGo.value=parseInt(document.scrollForm.PosLeftGo.value)+3;
        SetToXY('ScrollDiv',0,document.scrollForm.PosLeftGo.value);
        TimerScroll=setTimeout("PosBottomScroll()",20);
        }
      }  
      
    function StopScroll()
      {
      window.clearTimeout(TimerScroll);
      }