1kHtz?

In theory, the toggle function in the code below would create a PWM with a 1kHtz frequency with a 50% duty cycle, but I know there are some limitations to the hardware, has anybody tried something like this before?

function myFunction() {
  var pin,High,Low;
  if (arguments[0]) pin = arguments[0];
  else pin = LED1;
  
  if (arguments[1]) High = arguments[1]; 
  else High = 1000;
  
  if (arguments[2]) Low = arguments[2];
  else Low = 1000;
  
  function toggle () {
    if (obj.on) {
      obj.toggle = setTimeout(toggle,Low);
      obj.on = false;
      digitalWrite(pin,0);
    } else {
      obj.toggle = setTimeout(toggle,High);
      obj.on = true;
      digitalWrite(pin,1);
    }
  }
  
  var obj = {
    on: true,
    toggle: setTimeout(toggle,High)
  };
}

myFunction(C11,1,1);