Aheuh.Scroller=Class.create({initialize:function(type,objs,interval,speed){this._type=type;this._objs=objs;this._interval=interval;this._speed=speed;this._mouseWheelEvent=(document.all)?"mousewheel":"DOMMouseScroll";this._scrollingV=this._scrollingH=false;this._scrollVOld=this._scrollHOld=0;this._intMoveV=this._intMoveH=null},init:function(){if(this._type=="vertical"||this._type=="multi"){if(this._objs.mask.scrollHeight>this._objs.mask.offsetHeight){this.viewScrollElems(this._type,"visible",true)}else{this.viewScrollElems(this._type,"hidden",false)}Event.observe(this._objs.scUp,"mouseover",this._moveUpDown.bind(this,-1));Event.observe(this._objs.scDn,"mouseover",this._moveUpDown.bind(this,1));Event.observe(this._objs.scUp,"mouseout",this.stop.bind(this));Event.observe(this._objs.scDn,"mouseout",this.stop.bind(this));Event.observe(this._objs.mask,this._mouseWheelEvent,this._mouseWheelVChecker.bindAsEventListener(this));this._setVerticalCursor()}if(this._type=="horizontal"||this._type=="multi"){if(this._objs.mask.scrollWidth>this._objs.mask.offsetWidth){this.viewScrollElems(this._type,"visible",true)}else{this.viewScrollElems(this._type,"hidden",false)}Event.observe(this._objs.scLeft,"mouseover",this._moveLeftRight.bind(this,-1));Event.observe(this._objs.scRight,"mouseover",this._moveLeftRight.bind(this,1));Event.observe(this._objs.scLeft,"mouseout",this.stop.bind(this));Event.observe(this._objs.scRight,"mouseout",this.stop.bind(this));this._setHorizontalCursor()}},_moveUpDown:function(move){if(this._intMoveV==null){this._intMoveV=new PeriodicalExecuter(this._upDown.bind(this,move),this._interval/1000)}else{this._intMoveV.callback=this._upDown.bind(this,move);this._intMoveV.registerCallback()}},_moveLeftRight:function(move){if(this._intMoveH==null){this._intMoveH=new PeriodicalExecuter(this._leftRight.bind(this,move),this._interval/1000)}else{this._intMoveH.callback=this._leftRight.bind(this,move);this._intMoveH.registerCallback()}},_upDown:function(move){this._objs.mask.scrollTop+=this._speed*move;this._setUpDownCursor();if(this._objs.mask.scrollTop==this._scrollVOld){this.stop()}this._scrollVOld=this._objs.mask.scrollTop},_leftRight:function(move){this._objs.mask.scrollLeft+=this._speed*move;this._setLeftRightCursor();if(this._objs.mask.scrollLeft==this._scrollHOld){this.stop()}this._scrollHOld=this._objs.mask.scrollLeft},_setUpDownCursor:function(){this._objs.cursorV.style.top=this.cursorV.startY+this._objs.mask.scrollTop*this.cursorV.coeffY+"px"},_setLeftRightCursor:function(){this._objs.cursorH.style.left=this.cursorH.startX+this._objs.mask.scrollLeft*this.cursorH.coeffX+"px"},viewScrollElems:function(type,visibility,scrolling){if(type=="vertical"){this.showScrollElems(type,visibility);if(scrolling!="noChange"){this._scrollingV=scrolling}}else if(type=="horizontal"){this.showScrollElems(type,visibility);if(scrolling!="noChange"){this._scrollingH=scrolling}}},showScrollElems:function(type,visibility){if(type=="vertical"){this._objs.scrollbar.style.visibility=this._objs.scUp.style.visibility=this._objs.scDn.style.visibility=this._objs.cursorV.style.visibility=visibility;if(visibility=="hidden"){this._objs.cursorV.style.height=0}}else if(type=="horizontal"){this._objs.scrollbar.style.visibility=this._objs.scLeft.style.visibility=this._objs.scRight.style.visibility=this._objs.cursorH.style.visibility=visibility}},stop:function(){if(this._type=="vertical"&&this._intMoveV!=null||this._type=="multi"&&this._intMoveV!=null){this._intMoveV.stop()}if(this._type=="horizontal"&&this._intMoveH!=null||this._type=="multi"&&this._intMoveH!=null){this._intMoveH.stop()}},_setVerticalCursor:function(){if(!this.cursorV){this.cursorV={startY:this._objs.cursorV.offsetTop,initHeight:this._objs.cursorV.offsetHeight,diff:this._objs.mask.offsetHeight-this._objs.cursorV.offsetHeight,endY:this._objs.cursorV.offsetTop+this._objs.cursorV.offsetHeight};Event.observe(this._objs.scrollbarBgV,"click",this._moveUpDownByBg.bindAsEventListener(this))}else{this._objs.cursorV.style.top=this.cursorV.startY+"px";this._objs.cursorV.style.height=this.cursorV.initHeight+"px"}this.cursorV.coeffY=(this._objs.mask.offsetHeight-this.cursorV.diff)/(this._objs.mask.scrollHeight-this.cursorV.diff);if(this.cursorV.coeffY<0){this.cursorV.coeffY=0}if(isNaN(this.cursorV.coeffY)||this.cursorV.coeffY==Infinity)this.cursorV.coeffY=1;this._objs.cursorV.style.height=this._objs.cursorV.offsetHeight*this.cursorV.coeffY+"px";if(!this.myDragV){this.myDragV=new Aheuh.Drag(this._objs.cursorV,this._objs.cursorV.offsetLeft,this._objs.cursorV.offsetLeft,this.cursorV.startY,this.cursorV.endY,this.moveToY.bind(this))}else{this.myDragV.reload(this._objs.cursorV.offsetLeft,this._objs.cursorV.offsetLeft,this.cursorV.startY,this.cursorV.endY)}this._setUpDownCursor();this.moveToY()},_setHorizontalCursor:function(){if(!this.cursorH){this.cursorH={startX:this._objs.cursorV.offsetLeft,initWidth:this._objs.cursorV.offsetWidth,diff:this._objs.mask.offsetWidth-this._objs.cursorV.offsetWidth};Event.observe(this._objs.scrollbarBgH,"click",this._moveLeftRightByBg.bind(this))}else{this._objs.cursorH.style.left=this.cursorH.startX+"px";this._objs.cursorH.style.width=this.cursorH.initWidth+"px"}this.cursorH.coeffX=(this._objs.mask.offsetWidth-this.cursorH.diff)/(this._objs.mask.scrollWidth-this.cursorH.diff);if(this.cursorH.coeffX<0){this.cursorH.coeffX=0}this._objs.cursorH.style.width=this._objs.cursorH.offsetWidth*this.cursorV.coeffX+"px";this.cursorH.endX=this.cursorH.startX+this.cursorV.initWidth;if(!this.myDragH){this.myDragH=new Aheuh.Drag(this._objs.cursorH,this.cursorH.startX,this.cursorH.endX,this._objs.cursorV.offsetTop,this._objs.cursorV.offsetTop,this.moveToX.bind(this))}else{this.myDragH.reload(this.cursorH.startX,this.cursorH.endX,this._objs.cursorV.offsetTop,this._objs.cursorV.offsetTop)}this._setLeftRightCursor();this.moveToX()},_mouseWheelVChecker:function(e){e.stop();if(this._scrollingV){this._upDown(Event.Wheel(e)*-1)}},moveToY:function(){this._objs.mask.scrollTop=(parseInt(this._objs.cursorV.style.top)-this.cursorV.startY)/this.cursorV.coeffY},moveToX:function(){this._objs.mask.scrollLeft=(parseInt(this._objs.cursorV.style.left)-this.cursorV.startX)/this.cursorV.coeffX},moveToAnchor:function(label){if(this._scrollingV){if(this._type=="vertical"||this._type=="multi"){this._objs.mask.scrollTop=$(label).offsetTop;var cursorToMove=$(label).offsetTop*this.cursorV.coeffY;this._objs.cursorV.style.top=(this.cursorV.startY+cursorToMove+this._objs.cursorV.offsetHeight<this.cursorV.endY)?this.cursorV.startY+cursorToMove+"px":this.cursorV.endY-this._objs.cursorV.offsetHeight+"px"}}if(this._scrollingH){if(this._type=="horizontal"||this._type=="multi"){this._objs.mask.scrollLeft=$(label).offsetLeft;var cursorToMove=$(label).offsetLeft*this.cursorH.coeffX;this._objs.cursorH.style.left=(this.cursorH.startX+cursorToMove+this._objs.cursorH.offsetWidth<this.cursorH.endX)?this.cursorH.startX+cursorToMove+"px":this.cursorH.endX-this._objs.cursorH.offsetWidth+"px"}}},reload:function(){if(this._type=="vertical"||this._type=="multi"){if(this._objs.mask.scrollHeight>this._objs.mask.offsetHeight){this._fixFirefox();this._objs.mask.scrollTop=0;this._setVerticalCursor();this.viewScrollElems(this._type,"visible",true)}else{this.viewScrollElems(this._type,"hidden",false)}}if(this._type=="horizontal"||this._type=="multi"){if(this._objs.mask.scrollWidth>this._objs.mask.offsetWidth){this._fixFirefox();this._objs.mask.scrollLeft=0;this._setHorizontalCursor();this.viewScrollElems(this._type,"visible",true)}else{this.viewScrollElems(this._type,"hidden",false)}}},_fixFirefox:function(){var d=document.createElement("b");this._objs.mask.appendChild(d)},_moveUpDownByBg:function(e){var yMouse=Event.pointerY(e);var o=this._objs.cursorV;var move=(yMouse>o.offsetTop+o.offsetHeight)?1:-1;this._objs.mask.scrollTop+=this.cursorV.initHeight*move;this._setUpDownCursor()},_moveLeftRightByBg:function(e){var xMouse=Event.pointerX(e);var o=this._objs.cursorH;var move=(xMouse>o.offsetLeft+o.offsetWidth)?1:-1;this._objs.mask.scrollLeft+=this.cursorH.initWidth*move;this._setLeftRightCursor()}});