用jquery开发滚动式网页实例监控系统

   <style>

    
     * {
    
         list-style: none;
    
     }
    
  
    
     div {
    
         width: 100%;
    
         height: 1000px;
    
         background: skyblue;
    
     }
    
  
    
     div:nth-child(2) {
    
         background: lightpink;
    
     }
    
  
    
     div:nth-child(3) {
    
         background: lightgreen;
    
     }
    
  
    
     div:nth-child(4) {
    
         background: lightcoral;
    
     }
    
  
    
     ul {
    
         position: fixed;
    
         right: 30px;
    
         width: 100px;
    
         heigh