$(window).load(function() {
$('#status').delay(100).fadeOut('slow');
$('#preloader').delay(500).fadeOut('slow');
$('body').delay(500).css({'overflow':'visible'});
});
<!--==========Header===========-->
<div id="preloader">
<div id="status">
<div class="spinner">
<div class="bounce1"></div>
<div class="bounce2"></div>
<div class="bounce3"></div>
</div>
</div>
</div>