var flipDelay = 6500; 
var flipCurrent_i; 
// 
var flipTimer; 
var flipimages; 
// 
function flipInit() 
{ 
  var container = document.getElementById("flipcontainer"); 
  flipimages = container.getElementsByTagName("img"); 
  // ... find index of initial visible (if not defined) 
  if(typeof(flipCurrent_i)=="undefined") 
  { 
    for(var i=0;i<flipimages.length;i++){ 
      if(flipimages[i].style.visibility){ 
        flipCurrent_i = i; 
        break; 
      } 
    } 
  } 
  //.................................................. 
  flipTimer = setInterval("flipFlop()",flipDelay); 
} 
function flipFlop() 
{ 
  flipimages[flipCurrent_i].style.visibility = "" 
  flipCurrent_i = ++flipCurrent_i % flipimages.length 
  flipimages[flipCurrent_i].style.visibility = "visible" 
}