var MENU_POS = new Array();
	// item sizes for different levels of menu
	MENU_POS['height'] = [21, 21, 21,21,21];
	MENU_POS['width'] = [120, 120, 120,120,120];
	// menu block offset from the origin:
	//	for root level origin is upper left corner of the page
	//	for other levels origin is upper left corner of parent item
	MENU_POS['block_top'] = [0, 21, 0,0,0];
	MENU_POS['block_left'] = [15, 0, 120,140,140];
	// offsets between items of the same level
	MENU_POS['top'] = [0, 21, 21,21,21];
	MENU_POS['left'] = [110, 0, 0,0,0];
	// time in milliseconds before menu is hidden after cursor has gone out
	// of any items
	MENU_POS['hide_delay'] = [200, 200, 200,200,200];
	// path to gif containing one transparent pixel
	MENU_POS['pixel_path'] = 'pixel.gif';