diff -r 63a257541313 -r d3059e20b0fa scripts/dom-drag.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/dom-drag.js	Mon Mar 24 02:53:42 2008 -0400
@@ -0,0 +1,121 @@
+/**************************************************
+ * dom-drag.js
+ * 09.25.2001
+ * www.youngpup.net
+ **************************************************
+ * 10.28.2001 - fixed minor bug where events
+ * sometimes fired off the handle, not the root.
+ **************************************************/
+
+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.root.onDragStart(x, y);
+
+		o.lastMouseX	= e.clientX;
+		o.lastMouseY	= e.clientY;
+
+		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(nx, ny);
+		return false;
+	},
+
+	end : function()
+	{
+		document.onmousemove = null;
+		document.onmouseup   = null;
+		Drag.obj.root.onDragEnd(	parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]), 
+									parseInt(Drag.obj.root.style[Drag.obj.vmode ? "top" : "bottom"]));
+		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;
+	}
+};
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