function time_sensitive_greeting()
{
  // Time sensitive greeting message
  // set up greetings
  var morning = "Good Morning";
  var afternoon = "Good Afternoon";
  var evening = "Good Evening";

  // html element (spans are best) that will contain the greeting
  var greet_element = document.getElementById("time_sensitive_greeting");
  
  // ------- DON't CHANGE ANYTHING BELOW THIS LINE ------- \\

  // get the current time
  var time = new Date();
  var hours = time.getHours();

  if(hours >= 0 && hours < 12) greet_element.innerHTML = morning;
  else if(hours >= 12 && hours < 18) greet_element.innerHTML = afternoon;
  else if(hours >= 18 && hours < 24) greet_element.innerHTML = evening;
}

if(window.addEventListener) window.addEventListener('DOMContentLoaded', time_sensitive_greeting, false);
else if (document.addEventListener) document.addEventListener("DOMContentLoaded", time_sensitive_greeting, false);
else if(window.attachEvent) window.attachEvent('onload', time_sensitive_greeting);