Rails / Jquery: When loading a page how to see a spinning wheel?
<div id="container" >
    <img src="ajax-loader.gif" alt="Loading" />
</div>

<div id="container" >
   Replace image with Page content after fetching data ajax/jquery response
</div>

$('#loadingDiv')
    .hide()
    .ajaxStart(function() {
        $(this).show();
    })
    .ajaxStop(function() {
        $(this).hide();
    })
;
<div id="loading" style="display:none;">
    Loading Please Wait....
    <img src="ajax-loader.gif" alt="Loading" />
</div>