arent.id  + "( " +
							json.stringify(pp) + " )");
			}
			function checkAbove(/*Widget*/ above, /*Widget*/ below){
				// summary:
				//		Test that "above" widget is above "below" widget

				var ap = domGeom.position(above.domNode, true),
					bp = domGeom.position(below.domNode, true);

				doh.t(Math.round(ap.y+ap.h) <= Math.round(bp.y),
					"check " + above.id + "( " + json.stringify(ap) + " ) above " + below.id + "( " +
							json.stringify(bp) + " )");
			}
			function checkLeft(/*Widget*/ left