animated gif not replacing background image

gistfile1.js

var image = new Image();
image.src = "<?php echo base_url('assets/img/layout/upload_form_loading.gif'); ?>";
$('#submit-button').click(function() {
	$(this).css('background-image', 'url(' + image + ')');
	console.log($(this).css('background-image'));
	$(this).unbind('click');
});