慕课网小导航栏

<div class="layui-layout layui-layout-admin">
			<div class="layui-header shadow-header">
				<ul class="layui-nav layui-layout-left">
					<li class="layui-nav-item"><a href="../index.html">慕课网首页</a></li>
					<li class="layui-nav-item"><a href="courseIndex.html">课程中心</a></li>
					<li class="layui-nav-item"><a href="">学习讨论</a></li>
					<li class="layui-nav-item"><a href="">IT博文</a></li>
				</ul>
				<ul class="layui-nav layui-layout-right">
					<li class="layui-nav-item">
						<a href="javascript:;">
							<img class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../img/student/headPicture/1.jpg" class="layui-nav-img">
						</a>
					</li>
				</ul>
			</div>
		</div>