body>div{height: 40px;}
        label{
            display: inline-block;
            width: 50px; height: 22px; background:#dc3545; border-radius: 30px ; transition: background-color .6s linear;
        }
        /*在标签的前面插入一小圆形*/
        label::after{
            content: "关";width: 17px; height: 17px; background-color:#FFFFFF;color:#dc3545;display: inline-block;text-align: center;line-height: 17px;position: relative;left:3px;
            transition: transform.6s linear; border-radius: 50%;
        }
        /*获得复选框后面的第一个兄弟元素label*/
        input[type=checkbox]:checked+label{
            background-color:#28a745;
        }
        input[type=checkbox]:checked+label::after{
            content: "开";color:#28a745;transform: translate(27px);/*向右移动27px*/
        }
    


    
    

        
        

        
        



 
```php
设计阈值成功
";
        }
    else{
        echo "
请重新输入
";
        }
    break;
case "tfkg":
    if ($conn){
         $sql = "UPDATE control SET yfkg=000";
         $conn1= execute_sql($conn, "nongyedapeng", $sql);
         echo "
设计阈值成功
";
        }
    else{
        echo "
请重新输入
";
        }
    break;
default:
}
?>