<form onsubmit="return checkip()">
  <div>手機號<input type="tel" id="telphone" /></div>
  <div>密碼<input type="password" id="password" /></div>
  <input style="display: none;" type="submit" />
  <button>登錄</button>
</form>

function checkip(){
  const telphone = document.getElementById("telphone").value;
  const password = document.getElementById("password").value;
  console.log("password ->",telphone,password);
  return false;
}