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<!DOCTYPE html>
<html>
<body>
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<h2>JavaScript Math.random()</h2>
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<p>每当您点击按钮，getRndInteger(min, max) 就会返回 0 与 9（均包含）之间的随机数：</p>
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<button onclick="document.getElementById('demo').innerHTML = getRndInteger(0,10)">点击我</button>
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<p id="demo"></p>
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<script>
function getRndInteger(min, max) {
  return Math.floor(Math.random() * (max - min)) + min;
}
</script>
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</body>
</html>
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