var Drag =
{

obj : null,

init : function(o, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
{
	o.onmousedown = Drag.start;
	o.hmode = bSwapHorzRef ? false : true ;
	o.vmode = bSwapVertRef ? false : true ;
	o.root = oRoot && oRoot != null ? oRoot : o ;
	if (o.hmode  && isNaN(parseInt(o.root.style.left))) o.root.style.left = "0px";
	if (o.vmode  && isNaN(parseInt(o.root.style.top))) o.root.style.top = "0px";
	if (!o.hmode && isNaN(parseInt(o.root.style.right))) o.root.style.right = "0px";
	if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";	
	o.minX = typeof minX != 'undefined' ? minX : null;
	o.minY = typeof minY != 'undefined' ? minY : null;
	o.maxX = typeof maxX != 'undefined' ? maxX : null;
	o.maxY = typeof maxY != 'undefined' ? maxY : null;
	o.xMapper = fXMapper ? fXMapper : null;
	o.yMapper = fYMapper ? fYMapper : null;
	o.root.onDragStart = new Function();
	o.root.onDragEnd = new Function();
	o.root.onDrag = new Function();
},

start : function(e)
{
	var o = Drag.obj = this;
	e = Drag.fixE(e);
	var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
	var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right);
	o.lastMouseX = e.clientX;
	o.lastMouseY = e.clientY;
	o.root.onDragStart(o.lastMouseX,o.lastMouseY);
	if (o.hmode)
	{
		if (o.minX != null) o.minMouseX = e.clientX - x + o.minX;
		if (o.maxX != null) o.maxMouseX = o.minMouseX + o.maxX - o.minX;
	}
	else
	{
		if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
		if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
	}
	if (o.vmode)
	{
		if (o.minY != null) o.minMouseY = e.clientY - y + o.minY;
		if (o.maxY != null) o.maxMouseY = o.minMouseY + o.maxY - o.minY;
	}
	else
	{
		if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
		if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
	}
	document.onmousemove = Drag.drag;
	document.onmouseup = Drag.end;
	return false;
},

drag : function(e)
{
	e = Drag.fixE(e);
	var o = Drag.obj;	
	var ey = e.clientY;
	var ex = e.clientX;
	var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
	var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right);
	var nx, ny;
	if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
	if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
	if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
	if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);
	nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
	ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));
	if (o.xMapper) nx = o.xMapper(y)
	else if (o.yMapper) ny = o.yMapper(x)
	Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";
	Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
	Drag.obj.lastMouseX = ex;
	Drag.obj.lastMouseY = ey;
	Drag.obj.root.onDrag(ex,ey);
	return false;
},

end : function()
{
	document.onmousemove = null;
	document.onmouseup = null;
	Drag.obj.root.onDragEnd(Drag.obj.lastMouseX,Drag.obj.lastMouseY);
	Drag.obj = null;
},

fixE : function(e)
{
	if (typeof e == 'undefined') e = window.event;
	if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
	if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
	return e;
}

};

var doneDragDrop = false;

function computeRealPosition(obj)
{
	var par = obj.parentNode;
	var npar = par;
	var xx = 0;
	var yy = 0;
	var ww = par.offsetWidth;
	var hh = par.offsetHeight;
	var steps = 0;
	while (par != null && steps < 100)
	{
		++steps;
		xx += par.offsetLeft - par.scrollLeft;
		yy += par.offsetTop - par.scrollTop;
		par = par.offsetParent;
	}
	npar.realX = xx;
	npar.realY = yy;
	npar.realWidth = ww;
	npar.realHeight = hh;
}

function findDropElement(x,y)
{
	var drops = document.getElementsByName("drop");
	for (i = 0; i < drops.length; ++i)
	{
		computeRealPosition(drops.item(i));
	}
	for (i = 0; i < drops.length; ++i)
	{
		var par = drops.item(i).parentNode;
		if (par.realX <= x && par.realY <= y && x - par.realX <= par.realWidth && y - par.realY <= par.realHeight) return par;
	}
	return null;
}

var curDrop = null;

function onDragStart(x,y)
{
	curDrop = null;
	Drag.obj.copyIndex = Drag.obj.style.zIndex;
	Drag.obj.style.zIndex = 10000;
}

function onDrag(x,y)
{
	var drop = findDropElement(x,y);
	if (drop == curDrop) return;
	if (curDrop != null)
	{
		curDrop.style.border = '';
		curDrop.style.margin = '2px';
	}
	curDrop = drop;
	if (curDrop != null)
	{
		curDrop.style.margin = '';
		curDrop.style.border = '2px dotted #a9be07';
	}
}

function onDragEnd(x,y)
{
	var dragId = Drag.obj.id;
	computeRealPosition(Drag.obj);
	var drop = findDropElement(x,y);
	if (drop == null) immediateEvent(true,dragId,'ondrop',null,true);
	else
	{
		drop.style.border = '';
		drop.style.margin = '2px';
		var dropId = drop.id;
		immediateEvent(true,dragId,'ondrop',drop.id+':'+ (x - drop.realX) + ':' + (y - drop.realY),true);
	}
	curDrop = null;
	Drag.obj.style.zIndex = Drag.obj.copyIndex;
}

function doDragDrop()
{
	var drags = document.getElementsByName("drag");
	for (i = 0; i < drags.length; ++i)
	{
		var par = drags.item(i).parentNode;
		Drag.init(par);
		par.onDragStart = onDragStart;
		par.onDrag = onDrag;
		par.onDragEnd = onDragEnd;
	}
}

function mp(realx,realy)
{
	if (typeof e == 'undefined') e = window.event;
	var elem = document.getElementById(ii);
	var par = elem;
	var steps = 0;
	while (par != null && steps < 100)
	{
		++steps;
		realx -= par.offsetLeft - par.scrollLeft;
		realy -= par.offsetTop - par.scrollTop;
		par = par.offsetParent;
	}
	realx -= elem.clientLeft;
	realy -= elem.clientTop;
	posx = realx - dx;
	posy = realy - dy;
	var shiftx = posx;
	var shifty = posy;
	var dist = -1;
	var idx2 = -1;
	for (var i = 0; i < dxs.length && i < dys.length; ++i)
	{
		var distx = posx - dxs[i];
		var disty = posy - dys[i];
		var dist2 = distx * distx + disty * disty;
		if (dist < 0 || dist2 < dist)
		{
			shiftx = dxs[i];
			shifty = dys[i];
			dist = dist2;
			idx2 = i;
		}
	}
	if (idx2 != idx)
	{
		idx = idx2;
		if (!toggler)
		{
			var sldr = document.getElementById(ii2);
			if (sldr.style.display == 'none') sldr.style.display = '';
			sldr.style.left = shiftx + 'px';
			sldr.style.top = shifty + 'px';
			if (sldr.src != imgs[idx % imgs.length]) sldr.src = imgs[idx % imgs.length];
		}
		else
		{
			var sldr = document.getElementById(ii2.split('|')[idx]);
			if (sldr.style.display == 'none') sldr.style.display = '';
			else sldr.style.display = 'none';
		}
	}
}

function md(i,i2,dxx,dyy,imgss,dxss,dyss,imm,tg)
{
	ii = i;
	ii2 = i2;
	dx = dxx;
	dy = dyy;
	imgs = imgss.split('|');
	dxs = dxss.split('|');
	dys = dyss.split('|');
	immediate = imm;
	toggler = tg;
	idx = -1;
	if (!toggler)
	{
		document.onmousemove = mm;
		document.onmouseup = mu;
	}
	mp(event.clientX,event.clientY);
	if (toggler)
	{
		var sldrs = ii2.split('|');
		var vl = '';
		for (i = 0; i < sldrs.length; ++i)
		{
			if (document.getElementById(sldrs[i]).style.display != 'none')
			{
				if (vl.length > 0) vl += '|';
				vl += i;
			}
		}
		if (immediate) immediateEvent(true,ii,'onslide',vl,true);
		else delayedEvent(true,ii,'onslide',vl,true);
	}
	return false;
}

function mm(e)
{
	if (typeof e == 'undefined') e = window.event;
	mp(e.clientX,e.clientY);
}

function mu(e)
{
	document.onmousemove = null;
	document.onmouseup = null;
	if (immediate) immediateEvent(true,ii,'onslide',idx,true);
	else delayedEvent(true,ii,'onslide',idx,true);
}

function compute_position(obj)
{
	var npar = obj.offsetParent;
	var xx = obj.offsetLeft - obj.scrollLeft;
	var yy = obj.offsetTop - obj.scrollTop;
	var ww = obj.offsetWidth;
	var hh = obj.offsetHeight;
	var steps = 0;
	while (npar != null && steps < 100)
	{
		++steps;
		xx += npar.offsetLeft - npar.scrollLeft;
		yy += npar.offsetTop - npar.scrollTop;
		npar = npar.offsetParent;
	}
	obj.realX = xx;
	obj.realY = yy;
	obj.realWidth = ww;
	obj.realHeight = hh;
}

function slide_scale(action,obj,vidx,nulls,vertical,multiple,vs,cats,aids,aimgs0,aimgs1,aimgs2,mp)
{
	if (!obj.myVs)
	{
		obj.myVs = vs.split('|');
		obj.myCats = cats.split('|');
		obj.myIds = aids.split('|');
		obj.myImgs0 = aimgs0.split('|');
		obj.myImgs1 = aimgs1.split('|');
		obj.myImgs2 = aimgs2.split('|');
		obj.myIdx = -1;
		obj.myAction = action;
	}
	compute_position(obj);
	mp -= vertical ? obj.realY : obj.realX;
	var nidx = -1;
	for (var i = 0; i < obj.myIds.length; ++i)
	{
		var img = document.getElementById(obj.myIds[i]);
		if (vertical && img.offsetTop < mp || !vertical && img.offsetLeft < mp) nidx = i;
	}
	if (obj.myIdx == nidx && obj.myAction == action) return;
	obj.myIdx = nidx;
	obj.myAction = action;
	if (multiple)
	{
		if (action == 'd' && nidx >= 0)
		{
			obj.myVs[nidx] = obj.myVs[nidx] == 'y' ? 'n' : 'y';
			var ncat = obj.myCats[nidx % obj.myCats.length];
			if (obj.myVs[nidx] == 'y' && ncat != '')
			{
				for (var i = 0; i < obj.myIds.length; ++i)
				{
					if (obj.myCats[i] != '' && obj.myCats[i] != ncat) obj.myVs[i] = 'n';
				}
			}
		}
		for (var i = 0; i < obj.myIds.length; ++i)
		{
			var img = document.getElementById(obj.myIds[i]);
			var selected = obj.myVs[i % obj.myVs.length] == 'y';
			var src = '';
			if (i != nidx) src = selected ? obj.myImgs2[i % obj.myImgs2.length] : obj.myImgs0[i % obj.myImgs0.length];
			else src = obj.myImgs1[i % obj.myImgs1.length]; 
			if (img.src != src) img.src = src;
		}
		if (action == 'd' && nidx >= 0)
		{
			var newval = '';
			for (var i = 0; i < obj.myVs.length; ++i)
			{
				if (obj.myVs[i] == 'y')
				{
					if (newval != '') newval += '|';
					newval += i;
				}
			}
			immediateEvent(true,obj.id,'onslidescale',newval,true);
		}
	}
	else
	{
		var ncat = nidx < 0 ? null : obj.myCats[nidx % obj.myCats.length];
		var vcat = vidx < 0 ? null : obj.myCats[vidx % obj.myCats.length];
		for (var i = 0; i < obj.myIds.length; ++i)
		{
			var img = document.getElementById(obj.myIds[i]);
			var cat = obj.myCats[i % obj.myCats.length];
			var src = i == vidx || cat != '' && cat == vcat && i < vidx ? obj.myImgs2[i % obj.myImgs2.length] : i == nidx || cat != '' && cat == ncat && i < nidx ? obj.myImgs1[i % obj.myImgs1.length] : obj.myImgs0[i % obj.myImgs0.length];
			if (img.src != src) img.src = src;
		}
		if (action == 'd' && nidx >= 0)
		{
			obj.myVs[nidx] = obj.myVs[nidx] == 'y' ? 'n' : 'y';
			immediateEvent(true,obj.id,'onslidescale',nidx.toString(),true);
		}
	}
}