var lis = new Array('l1','l2','l3','l4','l5','l6','l7','l8','l9','l10');
  var used = new Array();
  var order = new Array();

  for(var i=0; i<lis.length; i++)
  {
    used[i] = 0;
    order[i] = -1;
  }
  for(var i=0; i<lis.length; i++)
  {
    var r = Math.floor(lis.length * Math.random());
    while(used[r] == 1)
    {
      r = Math.floor(lis.length * Math.random());
    }
    order[i] = r;
    used[r] = 1;
  }

var fadeIn;

function select()
{
  clearInterval(fadeIn);
  k=3;
  l=lis.length;
  j=cpt%(Math.ceil(l/k));
  document.getElementById("logo_footer").style.opacity=0;
  for (var i=0; i<l; i++)
  {
    document.getElementById(lis[i]).style.display = "none";
  }
  for(var i=k*j; i<k*(j+1) && i<l; i++)
  {
    document.getElementById(lis[order[i]]).style.display = "inline";
  }
  cpt++;
  op=0;
  fadeIn=setInterval(function(){document.getElementById("logo_footer").style.opacity=op;op+=0.01;},20);;
}

  var cpt=0;
  select();
  setInterval("select()",7000);

/*
  function select()
  {
  var lis = new Array('l1','l2','l3','l4','l5','l6','l7','l8','l9','l10');
  for (var i=0; i<lis.length; i++)
  {
    document.getElementById(lis[i]).style.display = "none";
  }

  var i = 0;
  var j = 0;
  var k = 0;
  var l = 0;

  while(i == j || i == k || i == l || j == k || j == l || k == l)
  {
    i = Math.floor(lis.length * Math.random());
    j = Math.floor(lis.length * Math.random());
    k = Math.floor(lis.length * Math.random());
    l = Math.floor(lis.length * Math.random());
  }

  document.getElementById(lis[i]).style.display = "inline";
  document.getElementById(lis[j]).style.display = "inline";
  document.getElementById(lis[k]).style.display = "inline";
  document.getElementById(lis[l]).style.display = "inline";

  }

  select();
  setInterval("select()",3000);
*/