function minutes_with_leading_zeros(dt)   
{   
  return (dt.getMinutes() < 10 ? '0' : '') + dt.getMinutes();  
}  
  
dt = new Date();   
console.log(minutes_with_leading_zeros(dt));   
  
dt = new Date(1989, 10, 1);   
console.log(minutes_with_leading_zeros(dt));