var image = new Array();
var imgcomment = new Array();

image[0] = 'Slide_0.jpg';
image[1] = 'Slide_1.jpg';
image[2] = 'Slide_2.jpg';
image[3] = 'Slide_3.jpg';
image[4] = 'Slide_4.jpg';
image[5] = 'Slide_5.jpg';
imgcomment[0] = 'The trailhead';
imgcomment[1] = 'Okina sugi';
imgcomment[2] = 'Wilson stump';
imgcomment[3] = 'Dioh sugi';
imgcomment[4] = 'Meoto sugi';
imgcomment[5] = 'Johmon sugi';

var p = image.length;

var j = 0;

var pre_load = new Array();
for (i = 0; i < p; i++) {
  pre_load[i] = new Image();
  pre_load[i].src = 'http://www.alternative-tourism.com/Japan/Tourism/Natural_places/Kyusyu/Yakushima/Okabu_trail/'+image[i];
}
  var tid=setInterval("chg_img()",2000);

function chg_img(){
	document.images.SlidePict.src = pre_load[j].src;
        document.SlideShowCom.SlideComment.value=imgcomment[j];
	j++;
	if (j > (p - 1)) j = 0;
}


function chg_img_up() {
  clearInterval(tid);
  j = j + 1;
  if (j > (p - 1)) j = 0;
  document.images.SlidePict.src = pre_load[j].src;
  document.SlideShowCom.SlideComment.value=imgcomment[j];

  }

function chg_img_down() {
  clearInterval(tid);
  j = j -1;
  if (j <0) j = p;
  document.images.SlidePict.src = pre_load[j].src;
  document.SlideShowCom.SlideComment.value=imgcomment[j];

  }

function set_presentation()
{
  var tid=setInterval("chg_img()",2000);
}