if switch 

<!DOCTYPE html>
<html lang="en">


<head>


    <meta charset="UTF-8">


    <meta name="viewport" content="width=device-width, initial-scale=1.0">


    <meta http-equiv="X-UA-Compatible" content="ie=edge">


    <title>js</title>


    <style>


        div {


            width: 20rem;


            height: 8rem;


            border: 0.1rem solid red;


            margin: auto;


            font-size: 2rem;


            text-align: center;


            font-size: 2rem;


            margin-top: 3rem;


            border-radius: 1rem;


            padding-top: 5rem;


        }




        .fcolor {


            color: blue;


        }


    </style>


   


</head>




<body>




    <div id="ceshi"></div>






    <SCript>




        function hello() {




            var random = parseInt(Math.random() * 10);




            var winder = "";


            switch (random) {


                case 1:


                    winder = "一等奖";


                    alert("一等奖");


                    break;


                case 2:


                    winder = "二等奖";


                    alert("二等奖");


                    break;


                case 3:


                    winder = "三等奖";


                    alert("三等奖");


                    break;




                default:


                    winder = "谢谢参与";


                    break;


            }


            // if (random == 1) {


            //     winder = "1等奖";


            // }else if(random === 2){


            //     winder = "2等奖";


            // } else if(random === 3){


            //     winder = "3等奖";


            // }else{


            //     winder = "谢谢参与";


            // }


            document.getElementById("ceshi").innerHTML = random + "_" + winder;


console.log("--------------",random + "_" + winder);




        }




        window.onload = hello();










    </SCript>


</body>




</html>






            

            
posted @ 
2018-05-03 22:14 
dongdongyang 
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