Can anyone help on this??
$('#imgPolicyDocument').click(function () {
overlay = $('<div></div>').prependTo('body').attr('id', 'divOverlayLoading');
center($('#Loadingdialog'));
$('#Loadingdialog').show();
document.body.style.overflow = 'hidden';
});
<div id='Loadingdialog' class="LoaderMainclass">
<div class="LoaderImgCarrier">
<img src="../css/images/ajax-loader.gif" alt="Loading" />
</div>
</div>