如何使用“确定最高数字”和“重置”按钮确定三个用户输入数字中的最大数字

// HTML代码：
<input type="number" id="num1" />
<input type="number" id="num2" />
<input type="number" id="num3" />
<button onclick="findMax()">确定最高数字</button>
<button onclick="reset()">重置</button>
<p id="result"></p>

// JavaScript代码：
function findMax() {
  var num1 = parseInt(document.getElementById("num1").value);
  var num2 = parseInt(document.getElementById("num2").value);
  var num3 = parseInt(document.getElementById("num3").value);

  if (isNaN(num1) || isNaN(num2) || isNaN(num3)) {
    document.getElementById("result").innerHTML = "请输入有效数字";
    return;
  }

  var maxNum = Math.max(num1, num2, num3);
  document.getElementById("result").innerHTML = "最高数字是：" + maxNum;
}

function reset() {
  document.getElementById("num1").value = "";
  document.getElementById("num2").value = "";
  document.getElementById("num3").value = "";
  document.getElementById("result").innerHTML = "";
}