function GACalcM(){
  var lambda_m, Gamma_m, GratingAngle_m;
  with(document.GACALCFORM_M)
  {
    lambda_m = Wavelength_m.value;
    Gamma_m = Math.asin(lambda_m*Math.pow(10,-4)/1.073251);
  
    GratingAngle_m = 33.02-180.0/Math.PI*Gamma_m;
    Angle_m.value = GratingAngle_m;
  }
}

function GACalcL(){
  var lambda_l, Gamma_l, GratingAngle_l;
  with(document.GACALCFORM_L)
  {
    lambda_l = Wavelength_l.value;
    Gamma_l = Math.asin(lambda_l*Math.pow(10,-4)/6.3495055);
  
    GratingAngle_l = 33.02-180.0/Math.PI*Gamma_l;
    Angle_l.value = GratingAngle_l;
  }
}