var ns4 = (document.layers)? true:false
var ie4 = (document.all)? true:false

// Changes to arrImages structure, courtesy of Iain

function layerWrite(id,text) {
  if (ns4) {
    var lyr = document.layers[id].document
    lyr.open()
    lyr.write(text + " of " + intTotalImages)
    lyr.close()
  }
  else if (ie4) document.all[id].innerHTML = text + " of " + intTotalImages
}

function ImageNavChange(direction) {
  if (intCurrentImage > -1 && intCurrentImage < intTotalImages) {
    if (direction == "next") {
      if (intCurrentImage != intTotalImages-1) {
        ++intCurrentImage;
      } else {
        intCurrentImage = 0;
      }
    } else {
      if (intCurrentImage != 0) {
        intCurrentImage = intCurrentImage - 1;
      } else {
        intCurrentImage = intTotalImages-1;
      }
    }
    document.imgMain.src = eval( "image" + (intCurrentImage+1)+ "[0]" );
    document.imgMain.alt = eval( "image" + (intCurrentImage+1)+ "[1]" );
    document.imgMain.width = eval( "image" + (intCurrentImage+1)+ "[2]" );
    document.imgMain.height = eval( "image" + (intCurrentImage+1)+ "[3]" );
    // alert( "Width: " + eval( "image" + (intCurrentImage+1)+ "[2]" ) + " Height: " + eval( "image" + (intCurrentImage+1)+ "[3]" ) );
  }
  layerWrite("ImageCount","Image " + (intCurrentImage + 1));
}