function animate(tagId,alfa,step){
 div = document.getElementById(tagId);
 
 cnt = div.childNodes.length;
 items = new Array(1);
 for(c=i=0;i < cnt;i++){
  if ( div.childNodes[i].tagName=="IMG"){
   items[c] = div.childNodes[i];
   c++;
  }
 }
 
 last = items[items.length-1];
 next = items[items.length-2];
 last.style.opacity= alfa/100;
 last.style.filter= "progid:DXImageTransform.Microsoft.Alpha(opacity="+alfa+")";
 last.style.filter= "alpha(opacity="+alfa+")";
 
 if ((alfa-step)>0){
  setTimeout("animate('"+tagId+"',"+(alfa-step)+","+step+");",50);
 }else{
  next.style.opacity= 1;
  next.style.filter= "progid:DXImageTransform.Microsoft.Alpha(opacity=100)";
  next.style.filter= "alpha(opacity=100)";
  tmp = last;
  div.removeChild(last);
  div.insertBefore(tmp,items[0]);
  tmp.style.opacity= 1;
  tmp.style.filter= "progid:DXImageTransform.Microsoft.Alpha(opacity=100)";
  tmp.style.filter= "alpha(opacity=100)";
 
 
  setTimeout("slideSwitch('"+tagId+"', 1000)", 3000);
 }
}
 
function slideSwitch(tagId,speed){
 var div = document.getElementById(tagId);
 if (div) {
   if (div.style.visibility!="visible"){
      div.style.visibility = "visible";
   }
   var items = div.getElementsByTagName('img');
   if (items.length>0){
    animate(tagId,100,10);
   }
 }
}