function inside(px,py, x1, x2, y1, y2){

	if (x1 < x2)
		return ((px > x1) && (px < x2) && (py > y1) && (py < y2));	
	else
		return (((px > x1) || (px < x2)) && (py > y1) && (py < y2));
	
}