How to make click function work for dynamically created DIV(say on some ohter click function) with some class or ID?

How to make click function work for dynamically created DIV(say on some ohter click function) with some class or ID?

Hi, I have created div and assign id or class to this div on some clicking event using jQuery. After creating I want to make click function work on this newly created div. But that is not working. Here is the sample code.
Thanks in advance.

<html>
  <body>
      <div id="some_ID"> Click me to create new divs! </div>
<script>
$("#some_ID").click(function() {
  var new_div = $('<div class="new_class"> I am created dynamically on clicking </div>');
  $("#some_ID").append(new_div);
 });

$(".new_class").click(function() {
 alert("hello i am newly created class using another class ");
}
</script>
</body>
</html>
But highlighted part of code is not working. May be when page loads it doesnt find new_class class which is created after clicking some_ID on same html page. Please correct me!