小蚁上树<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script type="text/javascript">
var n1 = parseInt(prompt("输个数"));
var n2 = parseInt(prompt("再输个数"));
//var sum = parseInt(n1) + parseInt(n2);
var sum = n1 + n2;
document.write("两个数相加的结果是"+sum);
</script>
</body>
</html>
效果展示：
产生10以内随机数
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script type="text/javascript">
document.write("<h1>恭喜你获得了"+Math.ceil(Math.random()*10)+"等奖</h1>")
</script>
</body>
</html>
显示效果：按F5刷新就能看到效果
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