The ready() event occurs after the HTML document has been loaded, while the load() event occurs later, when all content (e.g. images) also has been loaded.
The load() event is a standard event in the DOM, while the ready() event is specific to jQuery.
The purpose of the ready() event is that it should occur as early as possible after the document has loaded, so that code that adds funcionality to the elements in the page doesn’t have to wait for all content to load.
$('#doc').html('Document is ready and loaded');
$('#win').html('Window is ready and loaded');
<h4 id='doc'>Document Not Ready</h4>
<h4 id='win'>Window Not Ready</h4>
Run the code above and you will find that document will get ready first.
As for window, it will be ready after codecrawl.com is loaded inside the frame.