var ScrollWin = {

  w3c : document.getElementById,

  iex : document.all,

  scrollLoop : false,

  scrollInterval : null,

  currentBlock : null,

  getWindowHeight : function(){

    if(this.iex) return (document.documentElement.clientHeight) ? document.documentElement.clientHeight : document.body.clientHeight;

    else return window.innerHeight;

  },

  getScrollLeft : function(){

    if(this.iex) return (document.documentElement.scrollLeft) ? document.documentElement.scrollLeft : document.body.scrollLeft;

    else return window.pageXOffset;

  },

  getScrollTop : function(){

    if(this.iex) return (document.documentElement.scrollTop) ? document.documentElement.scrollTop : document.body.scrollTop;

    else return window.pageYOffset;

  },

  getElementYpos : function(el){

    var y = 0;

    while(el.offsetParent){

      y += el.offsetTop

      el = el.offsetParent;

    }

    return y;

  },

  scroll : function(num){

    if(1+1==2){

      location.href = "#"+this.anchorName+num;

      return;

    }

    if(this.scrollLoop){

      clearInterval(this.scrollInterval);

      this.scrollLoop = false;

      this.scrollInterval = null;

    }

    this.currentBlock = document.getElementById(this.blockName+num);

    var doc = document.getElementById(this.containerName);

    var documentHeight = this.getElementYpos(doc) + doc.offsetHeight;

    var windowHeight = this.getWindowHeight();

    var ypos = this.getElementYpos(this.currentBlock);

    if(ypos > documentHeight - windowHeight) ypos = documentHeight - windowHeight;

    this.scrollTo(0,ypos);

  },

  scrollTo : function(x,y){

    if(this.scrollLoop){

      var left = this.getScrollLeft();

      var top = this.getScrollTop();

      if(Math.abs(left-x) <= 1 && Math.abs(top-y) <= 1){

        window.scrollTo(x,y);

        clearInterval(this.scrollInterval);

        this.scrollLoop = false;

        this.scrollInterval = null;

      }else{

        window.scrollTo(left+(x-left)/2, top+(y-top)/2);

      }

    }else{

      this.scrollInterval = setInterval("ScrollWin.scrollTo("+x+","+y+")",100);

      this.scrollLoop = true;

    }

  }

};



ScrollWin.containerName = "main";

ScrollWin.anchorName    = "link";

ScrollWin.blockName     = "tipp";

ScrollWin.onClassName   = "active";

ScrollWin.offClassName  = "visited";