JS: Throttle

throttle.js

function throttle(cb, ms) {
  var flag = false;

  return function() {
    var context = this;
    var args = arguments;

    if ( flag ) {
      return;
    }

    flag = true;
    cb.apply(context, args);

    setTimeout(function() {
      flag = false;
    }, ms);
  }
}