ÿþ(function($){



$.fn.advancedScroller = function(o){

  var self = $(this);

  o = $.extend({

    height : self.height() || 300,

    width : self.width() || 220,

    speed : 75,

    delay : 500,

    scrollicon : true,

    scrollbar : true,

    scrollimages : false,

    scrollimageup : "",

    scrollimagedown : ""

  },o );

  if (typeof $.advancedScrollers == 'undefined'){

    $.advancedScrollers = []

  }

  var as_length = $.advancedScrollers.length;

  self.each(function(i){

    $.advancedScrollers.push( new $.AdvancedScroller(this,o,( i + as_length ) ) );

  });

  return self;

};



  $.AdvancedScroller = function(e,o,i){

     var self = this;

     this.elem = $(e);

     this.index = i;

     $.each(o, function(k,v){

       self[k] = v;

     });

     this.init();

     this.kjoer = setInterval("$.AdvancedScroller.prototype.scroll("+this.index+")", this.speed);

  };



  $.AdvancedScroller.prototype = {

    init : function(){

      var self = this;

      this.dim = [0, this.setMarkup(this.elem.children())];

      this.setEvents();

    },

    setMarkup : function(items){

      $('<div class=\'as_wrapper\'></div>').height(this.height).width(this.width).css({"position":"relative", "overflow": "hidden"}).appendTo(this.elem);

      $('<div class=\'as_scroller\'></div>').css({"position": "absolute", "top": "0px"}).append(items).appendTo(this.elem.children()).clone().appendTo(this.elem.children());

      this.scroller = this.elem.children().children();

      var scroller_height = this.scroller.slice(0,1).height();

      if (this.scrollicon) {

        this.scrollicon = $("<div></div>").addClass("scrollicon").css({"position": "absolute", 

								     "top": "0px", 

								     "right": "2px", 

								     "background": "#888", 

								     "opacity":".5", 

								     "filter":"alpha(opacity=50)" }).width(12).appendTo(this.elem.children());

        if (this.scrollbar){

          this.scrollbar = $("<div></div>").addClass("scrollbar").css({"position": "absolute", 

								"top": "0px", 

								"right": "2px", 

								"background": "#ddd"}).width(12).height(this.height).insertBefore(this.scrollicon);

          this.scroller.width(parseInt(this.scroller.width())-15);

        };

        this.scrollicon.height(Math.round(this.height*this.height/scroller_height)>9?Math.round(this.height*this.height/scroller_height):10);

       };

    return this.scroller.slice(0,1).height();;

    },

    scroll : function(self){

      self = $.advancedScrollers[self];

     

      if (self.dim[1] <= 0) {

        self.dim = [0, self.dim[1] - self.dim[0]];

      };

      self.scroller.each(function(i){

        $(this).css("top",self.dim[i]);

        self.dim[i] -= 1;

      });

      if ( self.scrollicon ) {

        self.scrollicon.css("top", Math.round( ( self.height - self.scrollicon.height() ) * (0-self.dim[0]) / (self.dim[1] - self.dim[0]) ) );

      } else { return; };

    },

    setEvents : function(){

      var self = this;

      if (this.scrollicon) {

      self.scrollicon.mousedown(function(e){

        clearInterval(self.kjoer);

        var start = [parseInt(self.scrollicon.css("top")), e.pageY];

        e.preventDefault();

        $("body").mousemove(function(e){

          var relative_move =  parseInt(e.pageY) - start[1];

          var scrollicon_move = (start[0]+relative_move>0?start[0]+relative_move:0)

          var scroller_height = (self.dim[1] - self.dim[0])

          self.dim[0] = Math.round( -1 * scroller_height / (self.height-self.scrollicon.height() ) * ( scrollicon_move <=(self.height-self.scrollicon.height())?scrollicon_move:(self.height-self.scrollicon.height())) ) - 1;

          self.dim[1] = self.dim[0] + scroller_height;

          self.scroll(self.index);

        });

      });

      }

      $("body").mouseup(function(){

        $("body").unbind("mousemove");

      });

      self.elem.mouseover(function(){

        clearInterval(self.kjoer);

      });

      self.elem.mouseout(function(){

        $("body").unbind("mousemove");

        clearInterval(self.kjoer);

        self.kjoer = setInterval("$.AdvancedScroller.prototype.scroll("+self.index+")",self.speed);

      });

    }

  };





})(jQuery);