var isIE = (document.all) ? true : false;

var gogo = function (id) {
 return "string" == typeof id ? document.getElementById(id) : id;
};



var Extend = function(destination, source) {
 for (var property in source) {
  destination[property] = source[property];
 }
}

var Bind = function(object, fun) {
 var args = Array.prototype.slice.call(arguments).slice(2);
 return function() {
  return fun.apply(object, args);
 }
}

var BindAsEventListener = function(object, fun) {
 return function(event) {
  return fun.call(object, Eventbb(event));
 }
}

function Eventbb(abb){
 var oEventcc = isIE ? window.event : abb;
 if (isIE) {
  oEventcc.pageX = oEventcc.clientX + document.documentElement.scrollLeft;
  oEventcc.pageY = oEventcc.clientY + document.documentElement.scrollTop;
  oEventcc.preventDefault = function () { this.returnValue = false; };
  oEventcc.detail = oEventcc.wheelDelta / (-40);
  oEventcc.stopPropagation = function(){ this.cancelBubble = true; }; 
 }
 return oEventcc;
}

var Each = function(list, fun){
 for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }
};

var CurrentStyle = function(element){
 return element.currentStyle || document.defaultView.getComputedStyle(element, null);
}

function addEventHandler(oTarget, sEventType, fnHandler) {
 if (oTarget.addEventListener) {
  oTarget.addEventListener(sEventType, fnHandler, false);
 } else if (oTarget.attachEvent) {
  oTarget.attachEvent("on" + sEventType, fnHandler);
 } else {
  oTarget["on" + sEventType] = fnHandler;
 }
};

function removeEventHandler(oTarget, sEventType, fnHandler) {
    if (oTarget.removeEventListener) {
        oTarget.removeEventListener(sEventType, fnHandler, false);
    } else if (oTarget.detachEvent) {
        oTarget.detachEvent("on" + sEventType, fnHandler);
    } else { 
        oTarget["on" + sEventType] = null;
    }
};



var Slider = Class.create();
Slider.prototype = {

  initialize: function(container, bar, options) {
 
 this.Bar = gogo(bar);
 this.Container = gogo(container);
 this._timer = null;
 this._ondrag = false;

 this._IsMin = this._IsMax = this._IsMid = false;

 this._drag = new Drag(this.Bar, { Limit: true, mxContainer: this.Container,
  onStart: Bind(this, this.DragStart), onStop: Bind(this, this.DragStop), onMove: Bind(this, this.Move)
 });
 
 this.SetOptions(options);
 
 this.WheelSpeed = Math.max(0, this.options.WheelSpeed);
 this.KeySpeed = Math.max(0, this.options.KeySpeed);
 
 this.MinValue = this.options.MinValue;
 this.MaxValue = this.options.MaxValue;
 
 this.RunTime = Math.max(1, this.options.RunTime);
 this.RunStep = Math.max(1, this.options.RunStep);
 
 this.Ease = !!this.options.Ease;
 this.EaseStep = Math.max(1, this.options.EaseStep);
 
 this.onMin = this.options.onMin;
 this.onMax = this.options.onMax;
 this.onMid = this.options.onMid;
 
 this.onDragStart = this.options.onDragStart;
 this.onDragStop = this.options.onDragStop;
 
 this.onMove = this.options.onMove;
 
 this._horizontal = !!this.options.Horizontal;
 

 this._drag[this._horizontal ? "LockY" : "LockX"] = true;
 

 addEventHandler(this.Container, "click", BindAsEventListener(this, function(e){ this._ondrag || this.ClickCtrl(e);}));

 addEventHandler(this.Bar, "click", BindAsEventListener(this, function(e){ e.stopPropagation(); }));
 

 this.WheelBind(this.Container);

 this.KeyBind(this.Container);

 var oFocus = isIE ? (this.KeyBind(this.Bar), this.Bar) : this.Container;
 addEventHandler(this.Bar, "mousedown", function(){ oFocus.focus(); });


  },

  SetOptions: function(options) {
 this.options = {
  MinValue: 0,
  MaxValue: 100,
  WheelSpeed: 5,
  KeySpeed:  50,
  Horizontal: true,
  RunTime: 20,
  RunStep: 2,
  Ease:  false,
  EaseStep: 5,
  onMin:  function(){},
  onMax:  function(){},
  onMid:  function(){},
  onDragStart:function(){},
  onDragStop: function(){},
  onMove:  function(){}
 };
 Extend(this.options, options || {});
  },

  DragStart: function() {
this.Stop();
   this.onDragStart();
 this._ondrag = true;
  },

  DragStop: function() {
   this.onDragStop();
 setTimeout(Bind(this, function(){ this._ondrag = false; }), 10);
  },

  Move: function() {
   this.onMove();
 
 var percent = this.GetPercent();

 if(percent > 0){
  this._IsMin = false;
 }else{
  if(!this._IsMin){ this.onMin(); this._IsMin = true; }
 }

 if(percent < 1){
  this._IsMax = false;
 }else{
  if(!this._IsMax){ this.onMax(); this._IsMax = true; }
 }

 if(percent > 0 && percent < 1){
  if(!this._IsMid){ this.onMid(); this._IsMid = true; }
 }else{
  this._IsMid = false;
 }
  },

  ClickCtrl: function(abbb) {
 var abbc = this.Container, iLeft = abbc.offsetLeft, iTop = abbc.offsetTop;
 while (abbc.offsetParent) { abbc = abbc.offsetParent; iLeft += abbc.offsetLeft; iTop += abbc.offsetTop; }

 this.EasePos(abbb.pageX - iLeft - this.Bar.offsetWidth / 2, e.pageY - iTop - this.Bar.offsetHeight / 2);
  },

  WheelCtrl: function(abbb) {
 var i = this.WheelSpeed * abbb.detail;
 this.SetPos(this.Bar.offsetLeft + i, this.Bar.offsetTop + i);

 abbb.preventDefault();
  },

  WheelBind: function(abbc) {

 addEventHandler(abbc, isIE ? "mousewheel" : "DOMMouseScroll", BindAsEventListener(this, this.WheelCtrl));
  },

  KeyCtrl: function(abbb) {
 if(this.KeySpeed){
  var iLeft = this.Bar.offsetLeft, iWidth = (this.Container.clientWidth - this.Bar.offsetWidth) / this.KeySpeed
   , iTop = this.Bar.offsetTop, iHeight = (this.Container.clientHeight - this.Bar.offsetHeight) / this.KeySpeed;

  switch (abbb.keyCode) {
   case 37 :
    iLeft -= iWidth; break;
   case 38 :
    iTop -= iHeight; break;
   case 39 :
    iLeft += iWidth; break;
   case 40 :
    iTop += iHeight; break;
   default :
    return;
  }
  this.SetPos(iLeft, iTop);

  abbb.preventDefault();
 }
  },

  KeyBind: function(abbc) {
 addEventHandler(abbc, "keydown", BindAsEventListener(this, this.KeyCtrl));

 abbc.tabIndex = -1;

 isIE || (abbc.style.outline = "none");
  },

  GetValue: function() {

 return this.MinValue + this.GetPercent() * (this.MaxValue - this.MinValue);
  },

  SetValue: function(value) {

 this.SetPercent((value- this.MinValue)/(this.MaxValue - this.MinValue));
  },

  GetPercent: function() {

 return this._horizontal ? this.Bar.offsetLeft / (this.Container.clientWidth - this.Bar.offsetWidth)
  : this.Bar.offsetTop / (this.Container.clientHeight - this.Bar.offsetHeight)
  },

  SetPercent: function(value) {

 this.EasePos((this.Container.clientWidth - this.Bar.offsetWidth) * value, (this.Container.clientHeight - this.Bar.offsetHeight) * value);
  },

  Run: function(bIncrease) {
 this.Stop();

 bIncrease = !!bIncrease;

 var percent = this.GetPercent() + (bIncrease ? 1 : -1) * this.RunStep / 100;
 this.SetPos((this.Container.clientWidth - this.Bar.offsetWidth) * percent, (this.Container.clientHeight - this.Bar.offsetHeight) * percent);

 if(!(bIncrease ? this._IsMax : this._IsMin)){
  this._timer = setTimeout(Bind(this, this.Run, bIncrease), this.RunTime);
 }
  },

  Stop: function() {
 clearTimeout(this._timer);
  },

  EasePos: function(iLeftT, iTopT) {
 this.Stop();

 iLeftT = Math.round(iLeftT); iTopT = Math.round(iTopT);

 if(!this.Ease){ this.SetPos(iLeftT, iTopT); return; }

 var iLeftN = this.Bar.offsetLeft, iLeftS = this.GetStep(iLeftT, iLeftN)
 , iTopN = this.Bar.offsetTop, iTopS = this.GetStep(iTopT, iTopN);

 if(this._horizontal ? iLeftS : iTopS){

  this.SetPos(iLeftN + iLeftS, iTopN + iTopS);
  
  if(this._IsMid){ this._timer = setTimeout(Bind(this, this.EasePos, iLeftT, iTopT), this.RunTime); }
 }
  },

  GetStep: function(iTarget, iNow) {
    var iStep = (iTarget - iNow) / this.EaseStep;
    if (iStep == 0) return 0;
    if (Math.abs(iStep) < 1) return (iStep > 0 ? 1 : -1);
    return iStep;
  },

  SetPos: function(iLeft, iTop) {
	  
 this.Stop();
 //this._drag.SetPos(iLeft, iTop);
  }
};


var Drag = Class.create();
Drag.prototype = {

  initialize: function(drag, options) {
 this.Drag = gogo(drag);
 this._x = this._y = 0;
 this._marginLeft = this._marginTop = 0;

 this._fM = BindAsEventListener(this, this.Move);
 this._fS = Bind(this, this.Stop);
 
 this.SetOptions(options);
 
 this.Limit = !!this.options.Limit;
 this.mxLeft = parseInt(this.options.mxLeft);
 this.mxRight = parseInt(this.options.mxRight);
 this.mxTop = parseInt(this.options.mxTop);
 this.mxBottom = parseInt(this.options.mxBottom);
 
 this.LockX = !!this.options.LockX;
 this.LockY = !!this.options.LockY;
 this.Lock = !!this.options.Lock;
 
 this.onStart = this.options.onStart;
 this.onMove = this.options.onMove;
 this.onStop = this.options.onStop;
 
 this._Handle = gogo(this.options.Handle) || this.Drag;
 this._mxContainer = gogo(this.options.mxContainer) || null;
 
 this.Drag.style.position = "absolute";

 if(isIE && !!this.options.Transparent){

  this._Handle.style.overflow = "hidden";

  with(this._Handle.appendChild(document.createElement("div")).style){
   width = height = "100%"; backgroundColor = "#fff"; filter = "alpha(opacity:0)";
  }
 }

 this.Repair();
 addEventHandler(this._Handle, "mousedown", BindAsEventListener(this, this.Start));
  },

  SetOptions: function(options) {
 this.options = {
  Handle:   "",
  Limit:   false,
  mxLeft:   0,
  mxRight:  9999,
  mxTop:   0,
  mxBottom:  9999,
  mxContainer: "",
  LockX:   false,
  LockY:   false,
  Lock:   false,
  Transparent: false,
  onStart:  function(){},
  onMove:   function(){},
  onStop:   function(){}
 };
 Extend(this.options, options || {});
  },

  Start: function(oEventcc) {
 if(this.Lock){ return; }
 this.Repair();

 this._x = oEventcc.clientX - this.Drag.offsetLeft;
 this._y = oEventcc.clientY - this.Drag.offsetTop;

 this._marginLeft = parseInt(CurrentStyle(this.Drag).marginLeft) || 0;
 this._marginTop = parseInt(CurrentStyle(this.Drag).marginTop) || 0;

 addEventHandler(document, "mousemove", this._fM);
 addEventHandler(document, "mouseup", this._fS);
 if(isIE){

  addEventHandler(this._Handle, "losecapture", this._fS);

  this._Handle.setCapture();
 }else{

  addEventHandler(window, "blur", this._fS);

  oEventcc.preventDefault();
 };

 this.onStart();
  },

  Repair: function() {
 if(this.Limit){

  this.mxRight = Math.max(this.mxRight, this.mxLeft + this.Drag.offsetWidth);
  this.mxBottom = Math.max(this.mxBottom, this.mxTop + this.Drag.offsetHeight);

  !this._mxContainer || CurrentStyle(this._mxContainer).position == "relative" || CurrentStyle(this._mxContainer).position == "absolute" || (this._mxContainer.style.position = "relative");
 }
  },

  Move: function(oEventcc) {

 if(this.Lock){ this.Stop(); return; };

 window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();

 this.SetPos(oEventcc.clientX - this._x, oEventcc.clientY - this._y);
  },

  SetPos: function(iLeft, iTop) {

 if(this.Limit){

  var mxLeft = this.mxLeft, mxRight = this.mxRight, mxTop = this.mxTop, mxBottom = this.mxBottom;

  if(!!this._mxContainer){
   mxLeft = Math.max(mxLeft, 0);
   mxTop = Math.max(mxTop, 0);
   mxRight = Math.min(mxRight, this._mxContainer.clientWidth);
   mxBottom = Math.min(mxBottom, this._mxContainer.clientHeight);
  };

  iLeft = Math.max(Math.min(iLeft, mxRight - this.Drag.offsetWidth), mxLeft);
  iTop = Math.max(Math.min(iTop, mxBottom - this.Drag.offsetHeight), mxTop);
 }

 if(!this.LockX){ this.Drag.style.left = iLeft - this._marginLeft + "px"; }
 if(!this.LockY){ this.Drag.style.top = iTop - this._marginTop + "px"; }

 this.onMove();
  },

  Stop: function() {

 removeEventHandler(document, "mousemove", this._fM);
 removeEventHandler(document, "mouseup", this._fS);
 if(isIE){
  removeEventHandler(this._Handle, "losecapture", this._fS);
  this._Handle.releaseCapture();
 }else{
  removeEventHandler(window, "blur", this._fS);
 };

 this.onStop();
  }
};


var sld = new Slider("idSlider", "idBar", {
 MaxValue: gogo("idContent").scrollWidth - gogo("idContent").clientWidth,
 onMin: function(){ gogo("idSliderLeft").style.backgroundPosition = "bottom left"; },
 onMax: function(){ gogo("idSliderRight").style.backgroundPosition = "bottom right"; },
 onMid: function(){ gogo("idSliderLeft").style.backgroundPosition = "top left"; gogo("idSliderRight").style.backgroundPosition = "top right"; },
 onMove: function(){ gogo("idContent").scrollLeft = this.GetValue(); }
});

sld.SetPercent(.5);
sld.Ease = true;

gogo("idSliderLeft").onmouseover = function(){ sld.Run(false); }
gogo("idSliderLeft").onmouseout = function(){ sld.Stop(); }

gogo("idSliderRight").onmouseover = function(){ sld.Run(true); }
gogo("idSliderRight").onmouseout = function(){ sld.Stop(); }