Javascript: sleep php like function for javascript

Use hold() method from StratifiedJS:

<script src="http://code.onilabs.com/apollo/0.13/oni-apollo.js"></script>
<script type="text/sjs">
  for (var i = 1; i < 4; i++) {
      alert(i);
      hold(1000);
  }
</script>

Reference:
http://stackoverflow.com/questions/10690801/sleep-function-in-javascript-without-using-recursion
http://onilabs.com/stratifiedjs