var dimages=new Array();
var numImages=7;
for (i=0; i<numImages; i++)
{
  dimages[i]=new Image();
  dimages[i].src="images/ncdcslide"+(i+1)+".jpg";
}
var curImage=-1;

 
function swapPicture()
{
  if (document.images)
  {
    var nextImage=curImage+1;
    if (nextImage>=numImages)
      nextImage=0;
    if (dimages[nextImage] && dimages[nextImage].complete)
    {
      var target=0;
      if (document.images.slide2)
        target=document.images.slide2;
      if (document.all && document.getElementById("slide2"))
        target=document.getElementById("slide2");
  
      // make sure target is valid.  It might not be valid
      //   if the page has not finished loading
      if (target)
      {
        target.src=dimages[nextImage].src;
        curImage=nextImage;
      }
 
      setTimeout("swapPicture()", 3000);
 
    }
    else
    {
      setTimeout("swapPicture()", 500);
    }
  }
}
 
setTimeout("swapPicture()", 3000);