/*************************************************************************
    Pixels-Lab Scroller V. 3.8
	Last Update = 13/07/2006
*************************************************************************/

dw_scrollObjs = {};
dw_scrollObj.speed = 50;

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;
	}
}

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;
}

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 i, wndo, holderId, holder, x, y;
	if ( navigator.userAgent.indexOf("Gecko") > -1 && navigator.userAgent.indexOf("Firefox") == -1 ) {
		dw_scrollObj.hold = [];
		for (i=0; arguments[i]; i++) {
			if ( dw_scrollObjs[ arguments[i] ] ) {
				wndo = document.getElementById( arguments[i] );
				holderId = wndo.parentNode.id;
				holder = document.getElementById(holderId);
				document.body.appendChild( holder.removeChild(wndo) );
				wndo.style.zIndex = 1000;
				x = holder.offsetLeft; y = holder.offsetTop;
				wndo.style.left = x + "px"; wndo.style.top = y + "px";
				dw_scrollObj.hold[i] = [ arguments[i], holderId ];
			}
		}
		window.addEventListener("resize", dw_scrollObj.rePositionGecko, true);
	}
}

dw_scrollObj.rePositionGecko = function() {
	var i, wndo, holder, x, y;
	if (dw_scrollObj.hold) {
		for (i=0; dw_scrollObj.hold[i]; i++) {
			wndo = document.getElementById( dw_scrollObj.hold[i][0] );
			holder = document.getElementById( dw_scrollObj.hold[i][1] );
			x = holder.offsetLeft; y = holder.offsetTop;
			wndo.style.left = x + "px"; wndo.style.top = y + "px";
		}
	}
}

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; // hold for setBarSize
			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);
		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.style.height = (lyr.offsetHeight > wn.offsetHeight)? bar.trkHt / ( lyr.offsetHeight / wn.offsetHeight ) + "px": bar.trkHt - 2*bar.minY + "px";
		bar.maxY = bar.trkHt - bar.offsetHeight - bar.minY;
	}
	if (this.hBarId) {
		bar = document.getElementById(this.hBarId);
		bar.style.width = (this.wd > wn.offsetWidth)? bar.trkWd / ( this.wd / wn.offsetWidth ) + "px": bar.trkWd - 2*bar.minX + "px";
		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.prototype.on_scroll = function() {}
dw_scrollObj.prototype.on_scroll_start = function() {}
dw_scrollObj.prototype.on_scroll_end = function() {}