Detect when Scroll reaches the BOTTOM of the page [ without jQuery ]

Question

I want to alert something when the scroll reaches the BOTTOM of the page, like this:

$(function(){
  $(document).scroll(function() {
    if($(document).scrol         


        

Answer 1

This is working for me in IE

document.onscroll = function() {
    if(document.documentElement.scrollTop + window.innerHeight == document.documentElement.scrollHeight)
    {
        alert('bottom');
    }
}

http://jsfiddle.net/cSer6/46/