dw_scrollObjs = {};
dw_scrollObj.speed = 100;
function dw_scrollObj(wnId, lyrId, cntId) {
    this.id = wnId; dw_scrollObjs[this.id] = this;
    this.animString = "dw_scrollObjs." + this.id;
    this.load(lyrId, cntId);
}
dw_scrollObj.loadLayer = function(wnId, id, cntId) {
    if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].load(id, cntId);
}
dw_scrollObj.prototype.load = function(lyrId, cntId) {
    if (!document.getElementById) return;
    var wndo, lyr;
    if (this.lyrId) {
        lyr = document.getElementById(this.lyrId);
        lyr.style.visibility = "hidden";
    }
    lyr = document.getElementById(lyrId);
    wndo = document.getElementById(this.id);
    lyr.style.top = this.y = 0; lyr.style.left = this.x = 0;
    this.maxY = (lyr.offsetHeight - wndo.offsetHeight > 0)? lyr.offsetHeight - wndo.offsetHeight: 0;
    this.wd = cntId? document.getElementById(cntId).offsetWidth: lyr.offsetWidth;
    this.maxX = (this.wd - wndo.offsetWidth > 0)? this.wd - wndo.offsetWidth: 0;
    this.lyrId = lyrId;
    lyr.style.visibility = "visible";
    this.on_load(); this.ready = true;
}
dw_scrollObj.prototype.on_load = function() {}  
dw_scrollObj.prototype.shiftTo = function(lyr, x, y) {
    lyr.style.left = (this.x = x) + "px"; 
    lyr.style.top = (this.y = y) + "px";
}
dw_scrollObj.GeckoTableBugFix = function() {
    var ua = navigator.userAgent;
    if ( ua.indexOf("Gecko") > -1 && ua.indexOf("Firefox") == -1 
        && ua.indexOf("Safari") == -1 && ua.indexOf("Konqueror") == -1 ) {
        dw_scrollObj.hold = [];
        for (var i=0; arguments[i]; i++) {
            if ( dw_scrollObjs[ arguments[i] ] ) {
                var wndo = document.getElementById( arguments[i] );
                var holderId = wndo.parentNode.id;
                var holder = document.getElementById(holderId);
                document.body.appendChild( holder.removeChild(wndo) );
                wndo.style.zIndex = 1000;
                var pos = getPageOffsets(holder);
                wndo.style.left = pos.x + "px"; wndo.style.top = pos.y + "px";
                dw_scrollObj.hold[i] = [ arguments[i], holderId ];
            }
        }
        window.addEventListener("resize", dw_scrollObj.rePositionGecko, true);
    }
}
dw_scrollObj.rePositionGecko = function() {
    if (dw_scrollObj.hold) {
        for (var i=0; dw_scrollObj.hold[i]; i++) {
            var wndo = document.getElementById( dw_scrollObj.hold[i][0] );
            var holder = document.getElementById( dw_scrollObj.hold[i][1] );
            var pos = getPageOffsets(holder);
            wndo.style.left = pos.x + "px"; wndo.style.top = pos.y + "px";
        }
    }
}
function getPageOffsets(el) {
    var left = el.offsetLeft;
    var top = el.offsetTop;
    if ( el.offsetParent && el.offsetParent.clientLeft || el.offsetParent.clientTop ) {
        left += el.offsetParent.clientLeft;
        top += el.offsetParent.clientTop;
    }
    while ( el = el.offsetParent ) {
        left += el.offsetLeft;
        top += el.offsetTop;
    }
    return { x:left, y:top };
}
dw_scrollObj.stopScroll = function(wnId) {
  if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].endScroll();
}
dw_scrollObj.doubleSpeed = function(wnId) {
  if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].speed *= 2;
}
dw_scrollObj.resetSpeed = function(wnId) {
  if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].speed /= 2;
}
dw_scrollObj.initScroll = function(wnId, deg, sp) {
  if ( dw_scrollObjs[wnId] ) {
    var cosine, sine;
    if (typeof deg == "string") {
      switch (deg) {
        case "up"    : deg = 90;  break;
        case "down"  : deg = 270; break;
        case "left"  : deg = 180; break;
        case "right" : deg = 0;   break;
        default: 
          alert("Direction of scroll in mouseover scroll links should be 'up', 'down', 'left', 'right' or number: 0 to 360.");
       }
    } 
    deg = deg % 360;
    if (deg % 90 == 0) {
      cosine = (deg == 0)? -1: (deg == 180)? 1: 0;
      sine = (deg == 90)? 1: (deg == 270)? -1: 0;
    } else {
      var angle = deg * Math.PI/180;
      cosine = -Math.cos(angle); sine = Math.sin(angle);
    }
    dw_scrollObjs[wnId].fx = cosine / ( Math.abs(cosine) + Math.abs(sine) );
    dw_scrollObjs[wnId].fy = sine / ( Math.abs(cosine) + Math.abs(sine) );
    dw_scrollObjs[wnId].endX = (deg == 90 || deg == 270)? dw_scrollObjs[wnId].x:
      (deg < 90 || deg > 270)? -dw_scrollObjs[wnId].maxX: 0; 
    dw_scrollObjs[wnId].endY = (deg == 0 || deg == 180)? dw_scrollObjs[wnId].y: 
      (deg < 180)? 0: -dw_scrollObjs[wnId].maxY;
    dw_scrollObjs[wnId].startScroll(sp);
  }
}
dw_scrollObj.prototype.startScroll = function(speed) {
  if (!this.ready) return; if (this.timerId) clearInterval(this.timerId);
  this.speed = speed || dw_scrollObj.speed;
  this.lyr = document.getElementById(this.lyrId);
  this.lastTime = ( new Date() ).getTime();
  this.on_scroll_start();  
  this.timerId = setInterval(this.animString + ".scroll()", 10); 
}
dw_scrollObj.prototype.scroll = function() {
  var now = ( new Date() ).getTime();
  var d = (now - this.lastTime)/1000 * this.speed;
  if (d > 0) {
    var x = this.x + this.fx * d; var y = this.y + this.fy * d;
    if (this.fx == 0 || this.fy == 0) {
      if ( ( this.fx == -1 && x > -this.maxX ) || ( this.fx == 1 && x < 0 ) || 
        ( this.fy == -1 && y > -this.maxY ) || ( this.fy == 1 && y < 0 ) ) {
        this.lastTime = now;
        this.shiftTo(this.lyr, x, y);
        this.on_scroll(x, y);
      } else {
        clearInterval(this.timerId); this.timerId = 0;
        this.shiftTo(this.lyr, this.endX, this.endY);
        this.on_scroll_end(this.endX, this.endY);
      }
    } else {
      if ( ( this.fx < 0 && x >= -this.maxX && this.fy < 0 && y >= -this.maxY ) ||
        ( this.fx > 0 && x <= 0 && this.fy > 0 && y <= 0 ) ||
        ( this.fx < 0 && x >= -this.maxX && this.fy > 0 && y <= 0 ) ||
        ( this.fx > 0 && x <= 0 && this.fy < 0 && y >= -this.maxY ) ) {
        this.lastTime = now;
        this.shiftTo(this.lyr, x, y);
        this.on_scroll(x, y);
      } else {
        clearInterval(this.timerId); this.timerId = 0;
        this.on_scroll_end(this.x, this.y);
      }
    }
  }
}
dw_scrollObj.prototype.endScroll = function() {
	if (!this.ready) return;
	if (this.timerId) clearInterval(this.timerId);
	this.timerId = 0;  this.lyr = null;
}
dw_scrollObj.prototype.on_scroll = function() {}
dw_scrollObj.prototype.on_scroll_start = function() {}
dw_scrollObj.prototype.on_scroll_end = function() {}
var dw_event = {
	add: function(obj, etype, fp, cap) {
		cap = cap || false;
		if (obj.addEventListener) obj.addEventListener(etype, fp, cap);
		else if (obj.attachEvent) obj.attachEvent("on" + etype, fp);
	}, 
	remove: function(obj, etype, fp, cap) {
		cap = cap || false;
		if (obj.removeEventListener) obj.removeEventListener(etype, fp, cap);
		else if (obj.detachEvent) obj.detachEvent("on" + etype, fp);
	}, 
	DOMit: function(e) { 
		e = e? e: window.event;
		e.tgt = e.srcElement? e.srcElement: e.target;
		if (!e.preventDefault) e.preventDefault = function () { return false; }
		if (!e.stopPropagation) e.stopPropagation = function () { if (window.event) window.event.cancelBubble = true; }
		return e;
	}
}
var dw_slidebar = {
	obj: null,
	slideDur: 500,
	init: function (bar, track, axis, x, y) {
		x = x || 0; y = y || 0;
		bar.style.left = x + "px"; bar.style.top = y + "px";
		bar.axis = axis; track.bar = bar;
		if (axis == "h") {
			bar.trkWd = track.offsetWidth;
			bar.maxX = bar.trkWd - bar.offsetWidth - x; 
			bar.minX = x; bar.maxY = y; bar.minY = y;
		} else {
			bar.trkHt = track.offsetHeight;
			bar.maxY = bar.trkHt - bar.offsetHeight - y; 
			bar.maxX = x; bar.minX = x; bar.minY = y;
		}
		bar.on_drag_start =  bar.on_drag =   bar.on_drag_end = 
		bar.on_slide_start = bar.on_slide =  bar.on_slide_end = function() {}
		bar.onmousedown = this.startDrag; track.onmousedown = this.startSlide;
	},
	startSlide: function(e) {
		if ( dw_slidebar.aniTimer ) clearInterval(dw_slidebar.aniTimer);
		e = e? e: window.event;
		var bar = dw_slidebar.obj = this.bar;
		e.offX = (typeof e.layerX != "undefined")? e.layerX: e.offsetX;
		e.offY = (typeof e.layerY != "undefined")? e.layerY: e.offsetY;
		bar.startX = parseInt(bar.style.left); bar.startY = parseInt(bar.style.top);
		if (bar.axis == "v") {
			bar.destX = bar.startX;
			bar.destY = (e.offY < bar.startY)? e.offY: e.offY - bar.offsetHeight;
			bar.destY = Math.min( Math.max(bar.destY, bar.minY), bar.maxY );
		} else {
			bar.destX = (e.offX < bar.startX)? e.offX: e.offX - bar.offsetWidth;
			bar.destX = Math.min( Math.max(bar.destX, bar.minX), bar.maxX );
			bar.destY = bar.startY;
		}
		bar.distX = bar.destX - bar.startX; bar.distY = bar.destY - bar.startY;
		dw_slidebar.per = Math.PI/(2 * dw_slidebar.slideDur);
		dw_slidebar.slideStart = (new Date()).getTime();
		bar.on_slide_start(bar.startX, bar.startY);
		dw_slidebar.aniTimer = setInterval("dw_slidebar.doSlide()",10);
	},
	doSlide: function() {
		if ( !dw_slidebar.obj ) { clearInterval(dw_slidebar.aniTimer); return; }    
		var bar = dw_slidebar.obj;   
		var elapsed = (new Date()).getTime() - this.slideStart;
		if (elapsed < this.slideDur) {
			var x = bar.startX + bar.distX * Math.sin(this.per*elapsed);
			var y = bar.startY + bar.distY * Math.sin(this.per*elapsed);
			bar.style.left = x + "px"; bar.style.top = y + "px";
			bar.on_slide(x, y);
		} else {
			clearInterval(this.aniTimer);
			bar.style.left = bar.destX + "px"; bar.style.top = bar.destY + "px";
			bar.on_slide_end(bar.destX, bar.destY);
			this.obj = null;
		}
	},
	startDrag: function (e) {
		e = dw_event.DOMit(e);
		if ( dw_slidebar.aniTimer ) clearInterval(dw_slidebar.aniTimer);
		var bar = dw_slidebar.obj = this;
		bar.downX = e.clientX; bar.downY = e.clientY;
		bar.startX = parseInt(bar.style.left);
		bar.startY = parseInt(bar.style.top);
		bar.on_drag_start(bar.startX, bar.startY);
		dw_event.add( document, "mousemove", dw_slidebar.doDrag, true );
		dw_event.add( document, "mouseup",   dw_slidebar.endDrag,  true );
		e.stopPropagation();
	},
	doDrag: function (e) {
		e = e? e: window.event;
		if (!dw_slidebar.obj) return;
		var bar = dw_slidebar.obj; 
		var nx = bar.startX + e.clientX - bar.downX;
		var ny = bar.startY + e.clientY - bar.downY;
		nx = Math.min( Math.max( bar.minX, nx ), bar.maxX);
		ny = Math.min( Math.max( bar.minY, ny ), bar.maxY);
		bar.style.left = nx + "px"; bar.style.top  = ny + "px";
		bar.on_drag(nx,ny);
		return false;  
	},
	endDrag: function () {
		dw_event.remove( document, "mousemove", dw_slidebar.doDrag, true );
		dw_event.remove( document, "mouseup",   dw_slidebar.endDrag,  true );
		if ( !dw_slidebar.obj ) return;
		dw_slidebar.obj.on_drag_end( parseInt(dw_slidebar.obj.style.left), parseInt(dw_slidebar.obj.style.top) );
		dw_slidebar.obj = null;  
	}
}
dw_scrollObj.prototype.bSizeDragBar = true;
dw_scrollObj.prototype.setUpScrollbar = function(id, trkId, axis, offx, offy) {
	if (!document.getElementById) return;
	var bar = document.getElementById(id);
	var trk = document.getElementById(trkId);
	dw_slidebar.init(bar, trk, axis, offx, offy);
	bar.wn = dw_scrollObjs[this.id];
	if (axis == "v") this.vBarId = id; else this.hBarId = id;
	if (this.bSizeDragBar) this.setBarSize();
	bar.on_drag_start = bar.on_slide_start = dw_scrollObj.getWndoLyrRef;
	bar.on_drag_end =   bar.on_slide_end =   dw_scrollObj.tossWndoLyrRef;
	bar.on_drag =       bar.on_slide =       dw_scrollObj.UpdateWndoLyrPos;
}
dw_scrollObj.getWndoLyrRef = function()  { this.wnLyr = document.getElementById(this.wn.lyrId); }
dw_scrollObj.tossWndoLyrRef = function() { this.wnLyr = null; }
dw_scrollObj.UpdateWndoLyrPos = function(x, y) {
	var nx, ny;
	if (this.axis == "v") {
		nx = this.wn.x;
		ny = -(y - this.minY) * ( this.wn.maxY / (this.maxY - this.minY) ) || 0;
	} else {
		ny = this.wn.y;
		nx = -(x - this.minX) * ( this.wn.maxX / (this.maxX - this.minX) ) || 0;
	}
	this.wn.shiftTo(this.wnLyr, nx, ny);
}
dw_scrollObj.prototype.updateScrollbar = function(x, y) {
	var nx, ny;
	if ( this.vBarId ) {
		if (!this.maxY) return;
		ny = -( y * ( (this.vbar.maxY - this.vbar.minY) / this.maxY ) - this.vbar.minY );
		ny = Math.min( Math.max(ny, this.vbar.minY), this.vbar.maxY);
		nx = parseInt(this.vbar.style.left);
		this.vbar.style.left = nx + "px"; this.vbar.style.top = ny + "px";
	} if ( this.hBarId ) {
		if (!this.maxX) return;
		nx = -( x * ( (this.hbar.maxX - this.hbar.minX) / this.maxX ) - this.hbar.minX );
		nx = Math.min( Math.max(nx, this.hbar.minX), this.hbar.maxX);
		ny = parseInt(this.hbar.style.top);
		this.hbar.style.left = nx + "px";
		this.hbar.style.top = ny + "px";
	} 
}
dw_scrollObj.prototype.restoreScrollbars = function() {
	var bar;
	if (this.vBarId) {
		bar = document.getElementById(this.vBarId);
		alert (bar);
		bar.style.left = bar.minX + "px"; bar.style.top = bar.minY + "px";
	}
	if (this.hBarId) {
		bar = document.getElementById(this.hBarId);
		bar.style.left = bar.minX + "px"; bar.style.top = bar.minY + "px";
	}
}
dw_scrollObj.prototype.setBarSize = function() {
	var bar;
	var lyr = document.getElementById(this.lyrId);
	var wn = document.getElementById(this.id);
	if (this.vBarId) {
		bar = document.getElementById(this.vBarId);
		bar.maxY = bar.trkHt - bar.offsetHeight - bar.minY; 
	}
	if (this.hBarId) {
		bar = document.getElementById(this.hBarId);
		bar.maxX = bar.trkWd - bar.offsetWidth - bar.minX; 
	}
}
dw_scrollObj.prototype.on_load = function() {
	this.restoreScrollbars();
	if (this.bSizeDragBar) this.setBarSize();
}
dw_scrollObj.prototype.on_scroll = dw_scrollObj.prototype.on_slide = function(x,y) { this.updateScrollbar(x,y); }
dw_scrollObj.prototype.on_scroll_start = dw_scrollObj.prototype.on_slide_start = function() {
	if ( this.vBarId ) this.vbar = document.getElementById(this.vBarId);
	if ( this.hBarId ) this.hbar = document.getElementById(this.hBarId);
}
dw_scrollObj.prototype.on_scroll_end = dw_scrollObj.prototype.on_slide_end = function(x, y) { 
	this.updateScrollbar(x,y);
	this.lyr = null; this.bar = null;
}
dw_scrollObj.slideDur = 500;
dw_scrollObj.scrollBy = function(wnId, x, y, dur) {
	if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].glideBy(x, y, dur);
}
dw_scrollObj.scrollTo = function(wnId, x, y, dur) {
	if ( dw_scrollObjs[wnId] ) dw_scrollObjs[wnId].glideTo(x, y, dur);
}
dw_scrollObj.prototype.glideBy = function(dx, dy, dur) {
	if ( !document.getElementById || this.sliding ) return;
	this.slideDur = dur || dw_scrollObj.slideDur;
	this.destX = this.destY = this.distX = this.distY = 0;
	this.lyr = document.getElementById(this.lyrId);
	this.startX = this.x; this.startY = this.y;
	if (dy < 0) this.distY = (this.startY + dy >= -this.maxY)? dy: -(this.startY  + this.maxY);
	else if (dy > 0) this.distY = (this.startY + dy <= 0)? dy: -this.startY;
	if (dx < 0) this.distX = (this.startX + dx >= -this.maxX)? dx: -(this.startX + this.maxX);
	else if (dx > 0) this.distX = (this.startX + dx <= 0)? dx: -this.startX;
	this.destX = this.startX + this.distX; this.destY = this.startY + this.distY;
	this.slideTo(this.destX, this.destY);
}
dw_scrollObj.prototype.glideTo = function(destX, destY, dur) {
	if ( !document.getElementById || this.sliding) return;
	this.slideDur = dur || dw_scrollObj.slideDur;
	this.lyr = document.getElementById(this.lyrId);
	this.startX = this.x; this.startY = this.y;
	this.destX = -Math.max( Math.min(destX, this.maxX), 0);
	this.destY = -Math.max( Math.min(destY, this.maxY), 0);
	this.distY = this.destY - this.startY;
	this.distX =  this.destX - this.startX;
	this.slideTo(this.destX, this.destY);
}
dw_scrollObj.prototype.slideTo = function(destX, destY) {
	this.per = Math.PI/(2 * this.slideDur); this.sliding = true;
	this.slideStart = (new Date()).getTime();
	this.aniTimer = setInterval(this.animString + ".doSlide()",10);
	this.on_slide_start(this.startX, this.startY);
}
dw_scrollObj.prototype.doSlide = function() {
	var elapsed = (new Date()).getTime() - this.slideStart;
	if (elapsed < this.slideDur) {
		var x = this.startX + this.distX * Math.sin(this.per*elapsed);
		var y = this.startY + this.distY * Math.sin(this.per*elapsed);
    this.shiftTo(this.lyr, x, y); this.on_slide(x, y);
	} else {
    clearInterval(this.aniTimer); this.sliding = false;
		this.shiftTo(this.lyr, this.destX, this.destY);
    this.lyr = null; this.on_slide_end(this.destX, this.destY);
	}
}
dw_scrollObj.prototype.on_slide_start = function() {}
dw_scrollObj.prototype.on_slide = function() {}
dw_scrollObj.prototype.on_slide_end = function() {}