/**
     * Gets the number of miles between 2 sets of lat/lon coords.
     * Requires the mMath library because J2ME is crippled
     */
    public static float getDistance(double newlat, double newlon, double oldlat, double oldlon ) {
        System.out.println("getdistance " + newlat + ", " + newlon + ", " + oldlat + ", " + oldlon);
        //DebugForm_old.getInstance().debug("getdistance " + newlat + ", " + newlon + ", " + oldlat + ", " + oldlon, 1);

//     acos(
//    cos(radians($1)) * cos(radians($2))    *cos(radians($3)) * cos(radians($4)) + cos(radians($1))*sin(radians($2))    *cos(radians($3))*sin(radians($4)) +         sin(radians($1))*sin(radians($3))
//  ) * 3963.1

        double dnewlatrads  = java.lang.Math.toRadians(newlat);
        double dnewlonrads  = java.lang.Math.toRadians(newlon);
        double doldlatrads  = java.lang.Math.toRadians(oldlat);
        double doldlonrads  = java.lang.Math.toRadians(oldlon);

        float miles = (float) mMath.acos(
                java.lang.Math.cos(dnewlatrads) * java.lang.Math.cos(dnewlonrads)    * java.lang.Math.cos(doldlatrads) * java.lang.Math.cos(doldlonrads) +
                java.lang.Math.cos(dnewlatrads) * java.lang.Math.sin(dnewlonrads)    * java.lang.Math.cos(doldlatrads) * java.lang.Math.sin(doldlonrads) +
                java.lang.Math.sin(dnewlatrads) * java.lang.Math.sin(doldlatrads)
                ) * 3963.1f;

        System.out.println("Returning " + miles + " miles.");
        return miles;
    }