var ImgList = document.all("artImg");
var titleList = document.all("titlediv");
var tdList = document.all("alltd");
var currImg =ImgList.length
var first = 0;

function playimg(){
  if(first!=0) hidimg(currImg);
  if(currImg>=(ImgList.length-1)){
    currImg = 0;
  }else {
    currImg = currImg+1;
  }
  showimg(currImg);
  first =1;
  setTimeout("playimg()",5000);
}

function hidimg(currImg){
    var objdiv;
    var objtd
    objimg = ImgList.item(currImg);
    if(isobj(titleList))
    objdiv = titleList.item(currImg);
    if(isobj(tdList))
    objtd = tdList.item(currImg);
    if(isobj(objtd)){
       objtd.style.display="none";
    }
    
    if (isobj(objimg) )
    {
    objimg.filters.item(0).apply();
    objimg.filters.item(0).transition = 23;
    objimg.style.visibility = "hidden";
    objimg.filters(0).play(1.5);
    
    }
    if(isobj(objdiv)){
        objdiv.style.visibility = "hidden";
    }   
}

function showimg(currImg){
     var objdiv;
     var objtd
    objimg = ImgList.item(currImg);
    if(isobj(titleList))
    objdiv = titleList.item(currImg);
    if(isobj(tdList))
    objtd = tdList.item(currImg);
    if(isobj(objtd)){
       objtd.style.display="";
    }   
    if (isobj(objimg)){
        objimg.filters.item(0).apply();
        objimg.filters.item(0).transition = 23;
        objimg.style.visibility = "";
        objimg.filters(0).play(1.5);
    }
    if(isobj(objdiv)){
        objdiv.style.visibility = "";
    }
}

function isobj(obj){
    if (obj==null)
    {
    return false;
    }
    else
    {
    return true;
    }
}

function initimg(){
    var imgobj ;
    for(i=0;i<ImgList.length;i++)
    {
            imgobj = ImgList.item(i);
            imgobj.style.filter="revealTrans(Duration=4.0, Transition=23)";
            imgobj.style.visibility="hidden";
    }
    playimg();
}
initimg();