prog

function f(a,b) {
    if( b == 0 )
    {
    return a;
    }
    return  f(a^b,2*(a&b));
}

function g(a, b)
{
  var i = 0;
  do
  {
    var tmp = a;
    a = a ^ b;
    b = (tmp & b) << 1;
  } while (b != 0);
  return a;
}

var x = g(1, -5);

WScript.Echo(x);