function jsScroller (o, w, h) {
  var self = this;
  var list = o.getElementsByTagName("div");
  for (var i = 0; i < list.length; i++) {
    if (list[i].className.indexOf("Scroller-Container") > -1) {
      o = list[i];
    }
  }
  
  //Private methods
  this._setPos = function (x, y) {
    if (x < this.viewableWidth - this.totalWidth) 
      x = this.viewableWidth - this.totalWidth;
    if (x > 0) x = 0;
    if (y < this.viewableHeight - this.totalHeight) 
      y = this.viewableHeight - this.totalHeight;
    if (y > 0) y = 0;
    this._x = x;
    this._y = y;
    with (o.style) {
      left = this._x +"px";
      top  = this._y +"px";
    }
  };
  
  //Public Methods
  this.reset = function () {
    this.content = o;
    this.totalHeight = o.offsetHeight;
    this.totalWidth   = o.offsetWidth;
    this._x = 0;
    this._y = 0;
    with (o.style) {
      left = "0px";
      top  = "0px";
    }
  };
  this.scrollBy = function (x, y) {
    this._setPos(this._x + x, this._y + y);
  };
  this.scrollTo = function (x, y) {
    this._setPos(-x, -y);
  };
  this.stopScroll = function () {
    if (this.scrollTimer) window.clearInterval(this.scrollTimer);
  };
  this.startScroll = function (x, y) {
    this.stopScroll();
    this.scrollTimer = window.setInterval(
      function(){ self.scrollBy(x, y); }, 40
    );
  };
  this.swapContent = function (c, w, h) {
    o = c;
    var list = o.getElementsByTagName("div");
    for (var i = 0; i < list.length; i++) {
      if (list[i].className.indexOf("Scroller-Container") > -1) {
        o = list[i];
      }
    }
    if (w) this.viewableWidth  = w;
    if (h) this.viewableHeight = h;
    this.reset();
  };
  
  //variables
  this.content = o;
  this.viewableWidth  = w;
  this.viewableHeight = h;
  this.totalWidth   = o.offsetWidth;
  this.totalHeight = o.offsetHeight;
  this.scrollTimer = null;
  this.reset();
};

function jsScrollbar (o, s, a, ev) {
  var self = this;
  
  this.reset = function () {
    //Arguments that were passed
    this._parent = o;
    this._src    = s;
    this.auto    = a ? a : false;
    this.eventHandler = ev ? ev : function () {};
    //Component Objects
    this._up   = this._findComponent("Scrollbar-Up", this._parent);
    this._down = this._findComponent("Scrollbar-Down", this._parent);
    this._yTrack  = this._findComponent("Scrollbar-Track", this._parent);
    this._yHandle = this._findComponent("Scrollbar-Handle", this._yTrack);
    //this._yContainer = this._findComponent("Scrollbar-Container", this._parent);
    //Height and position properties
    this._trackTop = findOffsetTop(this._yTrack);
    this._trackHeight  = this._yTrack.offsetHeight;
    this._handleHeight = this._yHandle.offsetHeight;
    this._x = 0;
    this._y = 0;
    //Misc. variables
    this._scrollDist  = 5;
    this._scrollTimer = null;
    this._selectFunc  = null;
    this._grabPoint   = null;
    this._tempTarget  = null;
    this._tempDistX   = 0;
    this._tempDistY   = 0;
    this._disabled    = true;
    this._ratio = (this._src.totalHeight - this._src.viewableHeight)/(this._trackHeight - this._handleHeight);
    
    this._yHandle.ondragstart  = function () {return false;};
    this._yHandle.onmousedown = function () {return false;};
    this._addEvent(this._src.content, "mousewheel", this._scrollbarWheel);
    this._removeEvent(this._parent, "mousedown", this._scrollbarClick);
    this._addEvent(this._parent, "mousedown", this._scrollbarClick);
    
    this._src.reset();
    with (this._yHandle.style) {
      top  = "0px";
      left = "0px";
    }
    this._moveContent();
    
    if (this._src.totalHeight < this._src.viewableHeight) {
      this._parent.style.opacity = "0";
      this._parent.style.filter = "alpha(opacity=0)";
      this._disabled = true;
      this._yHandle.style.visibility = "hidden";
      this._yTrack.style.visibility = "hidden";
      if (this.auto) this._parent.style.visibility = "hidden";
    } else {
      this._parent.style.opacity = "1.0";
      this._parent.style.filter = "alpha(opacity=100)";
      this._disabled = false;
      this._yHandle.style.visibility = "visible";
      this._parent.style.visibility  = "visible";
    }
  };
  this._addEvent = function (o, t, f) {
    if (o.addEventListener) o.addEventListener(t, f, false);
    else if (o.attachEvent) o.attachEvent('on'+ t, f);
    else o['on'+ t] = f;
  };
  this._removeEvent = function (o, t, f) {
    if (o.removeEventListener) o.removeEventListener(t, f, false);
    else if (o.detachEvent) o.detachEvent('on'+ t, f);
    else o['on'+ t] = null;
  };
  this._findComponent = function (c, o) {
    var kids = o.childNodes;
    for (var i = 0; i < kids.length; i++) {
      if (kids[i].className && kids[i].className == c) {
        return kids[i];
      }
    }
  };
  //Thank you, Quirksmode
  function findOffsetTop (o) {
    var t = 0;
    if (o.offsetParent) {
      while (o.offsetParent) {
        t += o.offsetTop;
        o  = o.offsetParent;
      }
    }
    return t;
  };
  this._scrollbarClick = function (e) {
    if (self._disabled) return false;
    
    e = e ? e : event;
    if (!e.target) e.target = e.srcElement;
    
    if (e.target.className.indexOf("Scrollbar-Up") > -1) self._scrollUp(e);
    else if (e.target.className.indexOf("Scrollbar-Down") > -1) self._scrollDown(e);
    else if (e.target.className.indexOf("Scrollbar-Track") > -1) self._scrollTrack(e);
    else if (e.target.className.indexOf("Scrollbar-Handle") > -1) self._scrollHandle(e);
    
    self._tempTarget = e.target;
    self._selectFunc = document.onselectstart;
    document.onselectstart = function () {return false;};
    
    self.eventHandler(e.target, "mousedown");
    self._addEvent(document, "mouseup", self._stopScroll, false);
    
    return false;
  };
  this._scrollbarDrag = function (e) {
    e = e ? e : event;
    var t = parseInt(self._yHandle.style.top);
    var v = e.clientY + document.body.scrollTop - self._trackTop;
    with (self._yHandle.style) {
      if (v >= self._trackHeight - self._handleHeight + self._grabPoint)
        top = self._trackHeight - self._handleHeight +"px";
      else if (v <= self._grabPoint) top = "0px";
      else top = v - self._grabPoint +"px";
      self._y = parseInt(top);
    }
    
    self._moveContent();
  };
  this._scrollbarWheel = function (e) {
    e = e ? e : event;
    var dir = 0;
    if (e.wheelDelta >= 120) dir = -1;
    if (e.wheelDelta <= -120) dir = 1;
    
    self.scrollBy(0, dir * 20);
    e.returnValue = false;
  };
  this._startScroll = function (x, y) {
    this._tempDistX = x;
    this._tempDistY = y;
    this._scrollTimer = window.setInterval(function () {
      self.scrollBy(self._tempDistX, self._tempDistY); 
    }, 40);
  };
  this._stopScroll = function () {
    self._removeEvent(document, "mousemove", self._scrollbarDrag, false);
    self._removeEvent(document, "mouseup", self._stopScroll, false);
    
    if (self._selectFunc) document.onselectstart = self._selectFunc;
    else document.onselectstart = function () { return true; };
    
    if (self._scrollTimer) window.clearInterval(self._scrollTimer);
    self.eventHandler (self._tempTarget, "mouseup");
  };
  this._scrollUp = function (e) {this._startScroll(0, -this._scrollDist);};
  this._scrollDown = function (e) {this._startScroll(0, this._scrollDist);};
  this._scrollTrack = function (e) {
    var curY = e.clientY + document.body.scrollTop;
    this._scroll(0, curY - this._trackTop - this._handleHeight/2);
  };
  this._scrollHandle = function (e) {
    var curY = e.clientY + document.body.scrollTop;
    this._grabPoint = curY - findOffsetTop(this._yHandle);
    this._addEvent(document, "mousemove", this._scrollbarDrag, false);
  };
  this._scroll = function (x, y) {
    if (y > this._trackHeight - this._handleHeight) 
      y = this._trackHeight - this._handleHeight;
    if (y < 0) y = 0;
    
    this._yHandle.style.top = y +"px";
    this._y = y;
    
    this._moveContent();
  };
  this._moveContent = function () {
    this._src.scrollTo(0, Math.round(this._y * this._ratio));
  };
  
  this.scrollBy = function (x, y) {
    this._scroll(0, (-this._src._y + y)/this._ratio);
  };
  this.scrollTo = function (x, y) {
    this._scroll(0, y/this._ratio);
  };
  this.swapContent = function (o, w, h) {
    this._removeEvent(this._src.content, "mousewheel", this._scrollbarWheel, false);
    this._src.swapContent(o, w, h);
    this.reset();
  };
  
  this.reset();
};