var MENU_POS = new Array();
	// item sizes for different levels of menu
	MENU_POS['height'] = [18, 18, 18, 18, 18, 18];
	MENU_POS['width'] = [80, 200, 80, 80, 80, 80];
	// 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'] = [80, 18, 10, 10, 10, 10];
	MENU_POS['block_left'] = [screen.width==1024 ? 122: (screen.width/2)-280, 0, 80, 80, 80, 80];
	// offsets between items of the same level
	MENU_POS['top'] = [0, 18, 18, 18, 18, 18];
	MENU_POS['left'] = [80, 0, 0, 0, 0, 0];
	// time in milliseconds before menu is hidden after cursor has gone out
	// of any items
	MENU_POS['hide_delay'] = [100, 100, 100, 100, 100, 100];
	// path to gif containing one transparent pixel
	MENU_POS['pixel_path'] = 'pixel.gif';