var debug = 0;					// used to enable debugging, 1 for ON, 0 for OFF
	var clrHighlighted = "#DBEAF5";			// highlight for cells
	var clrUnhighlighted = "#FFFFFF";		// unhighlight for cells
	var intStartCalculator = 0;			// the starting number of the calculator/layer
	var intTotalCalculators = 0;			// total number of calculators/layers
		
	debug = 0;