var __scroll = {sp:6, fps:16, timer:0};
function setScrollSp(sp) {
 if(typeof sp == "number") {
  this.__scroll.sp = sp;
 }
}
function setScrollFps(fps) {
 if(typeof fps == "number") {
  this.__scroll.fps = fps;
 }
}
function scrollToTop() {
 pageScroll(0, 0);
}
function getScrollLeft() {
 if(navigator.userAgent.indexOf("MSIE") != -1) {
  return (document.compatMode=="CSS1Compat")?document.documentElement.scrollLeft:document.body.scrollLeft;
 } else {
   return (window.pageXOffset) ? window.pageXOffset : 0;
 }
}
function getScrollTop() {
 if(navigator.userAgent.indexOf("MSIE") != -1) {
  return (document.compatMode=="CSS1Compat")?document.documentElement.scrollTop:document.body.scrollTop;
 } else {
   return (window.pageYOffset) ? window.pageYOffset : 0;
 }
}
function pageScroll(toX, toY, cuX, cuY) {
 clearTimeout(this.__scroll.timer);
 toX = (!toX || toX < 0) ? 0 : toX;
 toY = (!toY || toY < 0) ? 0 : toY;
 cuX = (!cuX) ? 0 + getScrollLeft() : cuX;
 cuY = (!cuY) ? 0 + getScrollTop() : cuY;
 cuX += (toX - getScrollLeft()) / this.__scroll.sp; 
 cuY += (toY - getScrollTop()) / this.__scroll.sp; 
 if(cuX < 0) { cuX = 0; }
 if(cuY < 0) { cuY = 0; }
 window.scrollTo(Math.floor(cuX), Math.floor(cuY));
 if(Math.floor(cuX) != toX || Math.floor(cuY) != toY) {
  this.__scroll.timer = setTimeout("pageScroll("+toX+","+toY+"," +cuX+","+cuY+")",this.__scroll.sp);
 }
}

// SCROLL_PAGE_LINK +++++++++++++++++++++++++++++++++++++//
ScrollClass.prototype.speed = 12;
ScrollClass.prototype.timer = 0;
ScrollClass.prototype.direction = new Object();
ScrollClass.prototype.offset = new Object();

ScrollClass.prototype.isCompatMode = document.compatMode == "CSS1Compat";
ScrollClass.prototype.major = parseInt(navigator.appVersion);
ScrollClass.prototype.minor = parseFloat(navigator.appVersion);
ScrollClass.prototype.isIE = navigator.userAgent.indexOf("MSIE") != -1;
ScrollClass.prototype.isOpera = window.opera;
ScrollClass.prototype.isMozilla = navigator.userAgent.indexOf("Gecko") != -1;
ScrollClass.prototype.isSafari = navigator.userAgent.indexOf('Safari') != -1;
ScrollClass.prototype.isNN  = navigator.userAgent.indexOf("Netscape") != -1;
ScrollClass.prototype.isMac = navigator.userAgent.indexOf("Mac") != -1;

var scroll = new ScrollClass();
function ScrollClass() {}
ScrollClass.prototype.setScrollSpeed = function(num) {
 if(typeof num == "number") {
  this.speed = num;
 }
}
ScrollClass.prototype.getScrollSpeed = function() {
 return this.speed;
}
ScrollClass.prototype.getMaxScroll = function() {
 var pos = new Object();
 if(this.isNN) {
  pos.x = this.major <= 5 ? document.documentElement.offsetWidth - window.innerWidth + 16 : document.documentElement.offsetWidth - window.innerWidth + 17;
  pos.y = this.major <= 5 ? document.documentElement.offsetHeight - window.innerHeight + 16 : document.documentElement.offsetHeight - window.innerHeight + 17;
 } else {
  if(this.isMac) {
   if(this.isIE) {
    pos.x = document.body.offsetWidth- document.body.clientWidth + 1;
    pos.y = document.body.offsetHeight - document.body.clientHeight + 1;
   } else {
    pos.x = document.documentElement.offsetWidth - window.innerWidth;
    pos.y = document.documentElement.offsetHeight - window.innerHeight;
   }
  } else {
   pos.x = this.isCompatMode ? document.documentElement.scrollWidth - document.documentElement.clientWidth : document.body.scrollWidth - document.body.clientWidth;
   pos.y = this.isCompatMode ? document.documentElement.scrollHeight - document.documentElement.clientHeight : document.body.scrollHeight - document.body.clientHeight;
  }
 }
 if(pos.x < 0) { pos.x = 0; }
 if(pos.y < 0) { pos.y = 0; }
 return {x:pos.x, y:pos.y };
}
ScrollClass.prototype.getScrollLeft = function() {
 if(this.isIE) {
  return this.isCompatMode ? document.documentElement.scrollLeft : document.body.scrollLeft;
 } else {
  return window.pageXOffset ? window.pageXOffset : 0;
 }
}
ScrollClass.prototype.getScrollTop = function() {
 if(this.isIE) {
  return this.isCompatMode ? document.documentElement.scrollTop : document.body.scrollTop;
 } else {
  return window.pageYOffset ? window.pageYOffset : 0;
 }
}
ScrollClass.prototype.scrollTo = function() {
 clearTimeout(this.timer);
 this.offset.x = null;
 this.offset.y = null;
 var toX = this.parse("x", this.findAnchor(arguments[0]) ? this.getAnchorPos(arguments[0]).x : arguments[0]);
 var toY = this.parse("y", this.findAnchor(arguments[1]) ? this.getAnchorPos(arguments[1]).y : arguments[1]);
 this.direction.is_x = toX - this.getScrollLeft() >= 0 ? true : false;
 this.direction.is_y = toY - this.getScrollTop() >= 0 ? true : false;
 if(this.isOpera) {
  window.scrollTo(toX, toY);
 } else {
  if(this.isMozilla) {
   //toY = toY - 16 > 0 ? toY - 16 : toY;
  }
  this.pageScroll(toX, toY);
 }
}
ScrollClass.prototype.findAnchor = function(id) {
 return (document.getElementsByName(id)[0] || document.anchors[id]);
}
ScrollClass.prototype.getAnchorPos = function(id) {
 if(document.getElementsByName(id)[0]) {
  var element = document.getElementsByName(id)[0];
  var obj = new Object();
  do {
   obj.x = (!obj.x) ? element.offsetLeft : obj.x + element.offsetLeft;
   obj.y = (!obj.y) ? element.offsetTop : obj.y + element.offsetTop;
  } while((element = element.offsetParent) != null);
  return {x:obj.x < 0 ? 0 : obj.x, y:obj.y };
 } else if(document.layers) {
  var element = document.anchors[id];
  return {x:element.x, y:element.y };
 } else {
  return {x:0, y:0};
 }
}
ScrollClass.prototype.parse = function(direction, value) {
 var maxScroll = this.getMaxScroll();
 var range = {min_x:0, max_x:maxScroll.x, min_y:0, max_y:maxScroll.y };
 switch(direction) {
  case "x":
   if(typeof value == "boolean") {
    return value ? 0 : this.getScrollLeft();
   } else if(typeof value == "number") {
    if(!this.isOpera) {
     if(value < 0) {
      return 0;
     } else if(value > range.max_x) {
      return range.max_x;
     }
    }
    return value;
   } else if(typeof value == "string") {
    switch(value) {
     case "left": return 0;
     case "center": return Math.floor(range.max_x / 2);
     case "right": return range.max_x;
     default: this.getScrollLeft();
    }
   }
   return this.getScrollLeft();
   break;
  case "y":
   if(typeof value == "boolean") {
    return value ? 0 : this.getScrollTop();
   } else if(typeof value == "number") {
    if(value < 0) {
     return 0;
    } else if(value > range.max_y) {
     return range.max_y;
    }
    return value;
   } else if(typeof value == "string") {
    switch(value) {
     case "top": return 0;
     case "middle": return Math.floor(range.max_y / 2);
     case "bottom": return range.max_y;
     default: this.getScrollTop();
    }
   }
   return this.getScrollTop();
   break;
 }
}
ScrollClass.prototype.pageScroll = function(toX, toY) {
 clearTimeout(this.timer);
 var dX = this.direction.is_x;
 var dY = this.direction.is_y;
 var scX = this.getScrollLeft();
 var scY = this.getScrollTop();
 var cuX = dX ? Math.ceil((toX - scX) / this.speed) : Math.floor((toX - scX) / this.speed);
 var cuY = dY ? Math.ceil((toY - scY) / this.speed) : Math.floor((toY - scY) / this.speed);
 if(((dX && scX + cuX < toX -1) || (!dX && scX + cuX > toX + 1)) || ((dY && scY + cuY < toY - 1) || (!dY && scY + cuY > toY +1))) {
  if(this.offset.x != null && this.offset.y != null) {
   if(this.offset.x == scX && this.offset.y == scY) {
    return;
   } else if((dX && this.offset.x > scX) || (!dX && this.offset.x < scX)) {
    return;
   } else if((dY && this.offset.y > scY) || (!dY && this.offset.y < scY)) {
    return;
   }
  }
  window.scrollTo(scX + cuX, scY + cuY);
  this.timer = setTimeout("ScrollClass.prototype.pageScroll("+toX+","+toY+")",this.speed);
  this.offset.x = scX;
  this.offset.y = scY;
 } else {
  clearTimeout(this.timer);
  window.scrollTo(toX, toY);
  return false;
 }
}