var imgid = 'image';
	var imgdir = './img/cargo/slideshow';
	var imgext = '.jpg';
	var thumbid = 'thumbs';
	var auto = true;
	var autodelay = 5;

var bxs,bxe,fxs,fxe,ys,ye,ta,ia,ie,st,ss,ft,fs,xp,yp,ci,t,tar,tarl,at,desc;
ta = document.getElementById(thumbid);
ia = document.getElementById(imgid);
t = ta.getElementsByTagName('li')
ie = document.all ? true : false;
st = 3;
ss = 3;
ft = 10;
fs = 5;
xp,yp = 0;
document.onmousemove = getPos;

function slideShow(){
  var taw = ta.parentNode.offsetWidth;
  var taa = taw / 4;
  bxs = leftPos(ta);
  bxe = bxs + taa;
  fxe = bxs + taw;
  fxs = fxe - taa;
  ys = topPos(ta);
  ye = ys + ta.offsetHeight;
  var len = t.length;
  tar = [];
	at = [];
  for(i=0; i < len; i++){
    var id = t[i].id;
    tar[i] = id; 
    t[i].onclick = new Function("getImg('" + id + "')");
	aa = t[i].getElementsByTagName('img');
//alert(altarg);
//	alert(altarg[0].getAttribute('alt'));
	at[id] = aa[0].getAttribute('alt') ? aa[0].getAttribute('alt') : '';
    if(i == 0) {
      getImg(id);
    }
  }
  tarl = tar.length;

	$j("#gallery").css("visibility","visible");
}

function scrlThumbs(d){
  clearInterval(ta.timer);
  var l;
  if(d == -1){
    l = 0;
  }else{
    l = t[tarl-1].offsetLeft - (ta.parentNode.offsetWidth - t[tarl-1].offsetWidth) + 10;
  }
  ta.timer = setInterval(function(){scrlMv(d,l)},st);
}

function scrlMv(d,l){
  ta.style.left = ta.style.left || '0px';
  var left = ta.style.left.replace('px','');
  if(d == 1){
    if(l - Math.abs(left) <= ss){
      cnclScrl(ta.id);
      ta.style.left = '-' + l + 'px';
    }else{
      ta.style.left = left - ss + 'px';
    }
  }else{
    if(Math.abs(left) - l <= ss){
      cnclScrl(ta.id);
      ta.style.left = l + 'px';
    }else{
      ta.style.left = parseInt(left) + ss + 'px';
    }
  }
}

function cnclScrl(){clearTimeout(ta.timer)}

function getImg(id){
  var hl = id.indexOf('_');
  var is,ip,il;
  if(hl != -1){
    ip = id.split('_');
    is = ip[0];
    il = ip[1];
  }else{
    is = id;
  }
  if(auto){clearTimeout(ia.timer)}
  if(ci != null){
    var ts = ia.getElementsByTagName('img');
    var tsl = ts.length;
    var x = 0;
    for(x; x < tsl; x++){
      if(ci.id != id){
        var o = ts[x];
        clearInterval(o.timer);
        o.timer = setInterval(function(){fdOut(o)},fs);
      }
    }
  }

  var i;
  if(!document.getElementById(ie)){
    if(hl != -1){
	if ( !document.getElementById("img_"+id) ) {
	      a = document.createElement('a');
	      a.setAttribute('href',il);
		a.setAttribute('id','img_'+id);
	      ia.appendChild(a);
	      i = document.createElement('img');
	      a.appendChild(i);
	}
    }else{
      i = document.createElement('img');
      ia.appendChild(i);
    }
    i.id = id;
    i.av = 0;
    i.style.opacity = 0;
    i.style.filter = 'alpha(opacity=0)';
    i.src = imgdir + '/' + is;
//	i.setAttribute('alt', t[x].getAttribute('alt') );
//alert(desc+":"+at[id]);
	jQuery("#image .desc").text(at[id]);
  }else{
    i = document.getElementById(is);
    clearInterval(i.timer);
  }

  i.timer = setInterval(function(){fdIn(i)},fs);
}

function imgNav(d){
  var curr = 0;
  var ae,ie;
//alert(ci.id);
//  for(key in tar){
//    ae = tar[key].split('_');
//    if(ae[0] == ci.id){
	for ( curr = 0; curr < tar.length; ++curr ) {
		if ( tar[curr] == ci.id ) {
      			break;
		}
	}
//  }
//  if(tar[parseInt(curr) + d]){
//    ie = tar[parseInt(curr) + d];
//  }else{
//    if(d == 1){
//      ie = tar[0];
//    }else{
//      ie = tar[tarl - 1];
//    }
//  }

//alert(curr);
//alert(tar.length);
	if ( tar[curr+d] ) {
		ie = tar[curr+d];
	} else {
		if ( curr+d < 0 ) {
			ie = tar[tar.length-1];
		} else if ( curr + d >= tar.length ) {
			ie = tar[0];
		}
	}

  getImg(ie);
}

function autoSlide(){
  ia.timer = setInterval(function(){imgNav(1)}, autodelay * 1000);
}

function fdIn(i){
  if(i.complete){
    i.av = i.av + fs;
    i.style.opacity = i.av / 100;
    i.style.filter = 'alpha(opacity=' + i.av + ')';
  }
  if(i.av >= 100){
    if(auto){autoSlide()}
    clearInterval(i.timer);
    ci = i;
  }
}

function fdOut(i){
  i.av = i.av - fs;
  i.style.opacity = i.av / 100;
  i.style.filter = 'alpha(opacity=' + i.av + ')';
  if(i.av <= 0){
	    clearInterval(i.timer);
	    if(i.parentNode){
		var alnk = document.getElementById("img_"+i.id);
//alert(i.id);
//alert(alnk);
		i = i.parentNode.removeChild(i);
		if ( alnk ) {
//alert(		alnk.parentNode);
		alnk.parentNode.removeChild(alnk);
		}
	}
  }
}

function getPos(e){
  if(ie){
    xp = event.clientX + document.body.scrollLeft;
    yp = event.clientY + document.body.scrollTop;
  }else{
    xp = e.pageX;
    yp = e.pageY;
  }  
  if(xp < 0){xp = 0}
  if(yp < 0){yp = 0}
  if(xp > bxs && xp < bxe && yp > ys && yp < ye){
    scrlThumbs(-1);
  }else if(xp > fxs && xp < fxe && yp > ys && yp < ye){
    scrlThumbs(1);
  }else{
    cnclScrl();
  }
}

function leftPos(t){
  var left = 0;
  if(t.offsetParent){
    while(1){
      left += t.offsetLeft;
      if(!t.offsetParent){break}
      t = t.offsetParent;
    }
  }else if(t.x){
    left += t.x;
  }
  return left;
}

function topPos(t){
  var top = 0;
  if(t.offsetParent){
    while(1){
      top += t.offsetTop;
      if(!t.offsetParent){break}
      t = t.offsetParent;
    }
  }else if(t.y){
    top += t.y;
  }
  return top;
}

slideShow();