Sleep function for Javascript

sleep.js

/* Usage
 * alert("Hi");
 * sleep(2000); // Sleep 2sec
 * alert("Goodby");
 */

function sleep(milliseconds) {
  var start = new Date().getTime();
  for (var i = 0; i < 1e7; i++) {
    if ((new Date().getTime() - start) > milliseconds){
      break;
    }
  }
}