setTimeout("fadeOut()", 1000);

function fadeOut()
{
  document.getElementById('designs_silver').style.visibility = 'hidden';
  document.getElementById('designs_gold').style.visibility = 'hidden';
  document.getElementById('designs_gold_plus').style.visibility = 'hidden';
  
  setTimeout("fadeIn()", 300);
}

function fadeIn()
{
  document.getElementById('designs_silver').style.visibility = 'visible';
  document.getElementById('designs_gold').style.visibility = 'visible';
  document.getElementById('designs_gold_plus').style.visibility = 'visible';
  
  setTimeout("fadeOut()", 1000);
}