function setImg(rel_val,img_num){
  var all_imgs=document.getElementsByTagName("img");
  var imgs=new Array();
  for(var i=0;i<all_imgs.length;i++){
      if(all_imgs[i].getAttribute('rel')==rel_val){
        imgs.push(all_imgs[i].src);

      }
    }

  num = rel_val.substr(10);
  document.getElementById('total'+num).innerHTML = imgs.length;
  document.getElementById(rel_val).src=imgs[img_num-1];
  loc = imgs[img_num-1].substr(0,imgs[img_num-1].length-4);
  document.getElementById('link'+num).href=loc+'big.jpg';
}

function prev(rel_val){
    num = rel_val.substr(10);

    if (imgGalleryCurrentImg[num]>1) {
		imgGalleryCurrentImg[num]--;
		setImg(rel_val,imgGalleryCurrentImg[num]);
		
        document.getElementById("current"+num).innerHTML = imgGalleryCurrentImg[num];
	}
}

function next(rel_val){
	num = rel_val.substr(10);
	
	var all_imgs=document.getElementsByTagName("img");
	var imgs=new Array();
	for(var i=0;i<all_imgs.length;i++){
		if(all_imgs[i].getAttribute('rel')==rel_val){
			imgs.push(all_imgs[i].src);
		}
	}
    
    if (imgGalleryCurrentImg[num]<imgs.length) {
	imgGalleryCurrentImg[num]++;
	setImg(rel_val,imgGalleryCurrentImg[num]);

	document.getElementById("current"+num).innerHTML = imgGalleryCurrentImg[num];
	}
}