修复一些小问题

examples/slider.html

@@ -16,6 +16,8 @@ body{padding:100px 0;}
 
   <div class="layui-container">
     <div id="slideTest1"></div>
+    <br>
+    <div id="slideTest2" style="margin: 45px 30px; display: inline-block;"></div>
   </div>
 
 <script src="../src/layui.js"></script>
@@ -50,6 +52,12 @@ layui.use('slider', function(){
   });
   
   sliderInst.setValue(30);
+
+
+  slider.render({
+    elem: '#slideTest2',
+    type: 'vertical'
+  });
 });
 </script>
 </body>