如何创建一个10分钟的定时器，使用Javascript在HTML中自动提交表单。(提交后，空白字段自动设置为0)

<form id="myForm">
  <input type="text" name="field1" placeholder="Field 1">
  <input type="text" name="field2" placeholder="Field 2">
  <input type="text" name="field3" placeholder="Field 3">
  <button type="submit">Submit</button>
</form>

function startTimer() {
  setTimeout(function() {
    var form = document.getElementById("myForm");
    var inputs = form.getElementsByTagName("input");
    
    for (var i = 0; i < inputs.length; i++) {
      if (inputs[i].value === "") {
        inputs[i].value = "0";
      }
    }
    
    form.submit();
  }, 600000); // 10分钟 = 600000毫秒
}

<script>
  window.onload = function() {
    startTimer();
  };
</script>