jQuery苹果ios10风格背景图片视差动画特效

js代码

<script src="js/jquery-1.11.0.min.js" type="text/javascript"></script>
<script src="js/ios-parallax.js"></script>
  <script type="text/javascript">
	$(document).ready(function() {
	  $('#top-image').iosParallax({
		movementFactor: 50
	  });
	});
</script>