var loop = 0;
function f_move(obj,pix)
{
  xattr = document.getElementById(obj).attributes;  
  xleft  = document.getElementById(obj).style.left;    

  yleft = xleft.substr(0, xleft.lastIndexOf('px')) ;  
  yleft = Number(yleft) + pix;
  
  document.getElementById(obj).style.left= yleft + "px";
  return yleft;         

}
function f_reset(obj)
{
  document.getElementById(obj).style.left= "0px";
}

function f_slidex()
{
  ymax = 825; 
  ydet = 165;
  yy   = ''
  mov =  5     
  loop += mov;
  if (loop < ydet)
  {
    window.setTimeout('f_slidex()',100); 
  }
  
  yleft = f_move('x1',mov);
  if (yleft >= ymax)
  {
    f_reset("x1")
  }
    
  yleft = f_move('x2',mov);
  if (yleft >= ymax)
  {
    f_reset("x2")
  }
  
  yleft = f_move('x3',mov);
  if (yleft >= ymax)
  {
    f_reset("x3")
  }
  yleft = f_move('x4',mov);
  if (yleft >= ymax)
  {
    f_reset("x4")
  }
  
  yleft = f_move("x5",mov);
  if (yleft >= ymax )
  {     
    f_reset("x5")    
  }
  return 0;  
  
}

function f_slide()
{ 
  loop = 0;
  f_slidex(); 

} 
function f_interslide()
{ 
  window.setInterval("f_slide()",6000);
}