var slider = function() 
{ 
  function getElementsByClass(object, tag, className) 
  { 
    var o = object.getElementsByTagName(tag); 
    for ( var i = 0, n = o.length, ret = []; i < n; i++) 
    { 
      if (o[i].className == className) ret.push(o[i]); 
    } 
    if (ret.length == 1) ret = ret[0]; 
    return ret; 
  }
   
  var slides = []; 
  var S, S0, iW, iH, oP, oc, frm, NF, view, Z; 
  var wh, ht, wr, r, mx, mn; 
  var run = function () 
  { 
    Z += (mn - Z) * .5; 
    view.calc(); 
    var i = NF; 
    while (i--) slides[i].move(); 
  } 
  	
  var resize = function () 
  { 
    wh = oc.clientWidth; 
    ht = oc.clientHeight; 
    wr = wh * iW; 
    r  = ht / wr; 
    mx = wh / NF; 
    mn = (wh * (1 - iW)) / (NF - 1); 
  } 
  Slide = function (N) { 
  this.N      = N; 
  this.x0     = this.x1 = N * mx; 
  this.v      = 0; 
  this.loaded = false; 
  this.cpt    = 0; 
  this.start  = new Date(); 
  this.obj    = frm[N]; 
  this.txt    = getElementsByClass(this.obj, 'div', 'text'); 
  this.img    = getElementsByClass(this.obj, 'img', 'diapo'); 
  this.bkg    = document.createElement('div'); 
  this.bkg.className = 'backgroundText'; 
  this.obj.insertBefore(this.bkg, this.txt); 
  if (N == 0) this.obj.style.borderLeft = 'none'; 
  this.obj.style.left = Math.floor(this.x0) + 'px'; 
 
  this.obj.parent = this; 
  this.obj.onmouseover = function() { 
  this.parent.over(); 
  return false; 
  } 
  	} 
 
  Slide.prototype.calc = function () { 
  for (var i = 0; i <= this.N; i++) 
  slides[i].x1 = i * Z; 
  for (var i = this.N + 1; i < NF; i++) 
  slides[i].x1 = wh - (NF - i) * Z; 
  	} 
 
  Slide.prototype.move = function() 
  { 
    var s = (this.x1 - this.x0) / S; 
 
    if (this.N && Math.abs(s) > .5) 
    this.obj.style.left = Math.floor(this.x0 += s) + 'px'; 
 
    var v = (this.N < NF - 1) ? slides[this.N + 1].x0 - this.x0 : wh - this.x0; 
    if (Math.abs(v - this.v) > .5) { 
    this.bkg.style.top = this.txt.style.top = Math.floor(2 + ht - (v - Z) * iH * r) + 'px'; 
    this.v = v; 
    this.cpt++; 
    } else { 
    
    if (!this.pro) { 
 
    this.pro = true; 
    var tps = new Date() - this.start; 
    if(this.cpt > 1) { 
    S = Math.max(2, (28 / (tps / this.cpt)) * S0); 
    } 
    } 
    } 
    if (!this.loaded) { 
    if (this.img.complete) { 
    this.img.style.visibility = 'visible'; 
    this.loaded = true; 
    } 
    } 
  } 
 
  	Slide.prototype.over = function () { 
  resize(); 
  view = this; 
  this.start = new Date(); 
  this.cpt = 0; 
  this.pro = false; 
  this.calc(); 
  	} 
 
  	var init = function (oCont, speed, iw, ih, op) { 
  S   = S0 = speed; 
  iW  = iw; 
  iH  = ih; 
  oP  = op; 
  oc  = document.getElementById(oCont); 
  frm = getElementsByClass(oc, 'div', 'slide'); 
  NF  = frm.length; 
  resize(); 
  for (var i = 0; i < NF; i++) 
  slides[i] = new Slide(i); 
  view = slides[0]; 
  Z = mx; 
  setInterval(run, 32); 
  	} 
 
  	return { 
  init : init 
  	} 
}();