Question

<!DOCTYPE html>
<html>

  <body>
    <script type="text/javascript">
      var images1 = new Array("strawberry.jpg", "apple.jpg", "cherry.jpg", "orange.jpg", "pear.jpg");
      var images2 = new Array("strawberry.jpg", "apple.jpg", "cherry.jpg", "orange.jpg", "pear.jpg");
      var images3 = new Array("strawberry.jpg", "apple.jpg", "cherry.jpg", "orange.jpg", "pear.jpg");
      var length = images1.length;
      var randImg = Math.round(Math.random() * (length - 1));
      document.write('<img src="' + images1[randImg] + '" >');
      var length = images2.length;
      var randImg = Math.round(Math.random() * (length - 1));
      document.write('<img src="' + images2[randImg] + '" >');
      var length = images3.length;
      var randImg = Math.round(Math.random() * (length - 1));
      document.write('<img src="' + images3[randImg] + '" >');

    </script>
  </body>

</html>

我想比较阵列的图像，如果3张图像是草莓我想创建一个警告信息，比如'恭喜你赢了'但是我不能那样做，我怎么能这样做？

Answer 1

试试这个：

<!DOCTYPE html>
<html>

  <body>
    <script type="text/javascript">
      var images = ["strawberry.jpg", "apple.jpg", "cherry.jpg", "orange.jpg", "pear.jpg"];
      var length = images.length;
      var randImg1 = Math.round(Math.random() * (length - 1));
      document.write('<img src="' + images[randImg1] + '" >');
      var randImg2 = Math.round(Math.random() * (length - 1));
      document.write('<img src="' + images[randImg2] + '" >');
      var randImg3 = Math.round(Math.random() * (length - 1));
      document.write('<img src="' + images[randImg3] + '" >');

      if (randImg1 == randImg2 && randImg2 == randImg3 && randImg3 == "strawberry.jpg") {
          // You won!
      }

    </script>
  </body>

</html>

请注意我删除了多余的images1，2和3并将其替换为单个数组images。我还删除了构造函数，并对length1，2和3执行了相同的操作。

然而，关键部分是我如何定义3个随机变量，randImg1，2和3。然后你可以稍后比较它们。

Javascript作业

1 个答案: