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<!DOCTYPE html>
<html>
<body>
<input type="submit" name="submit1" id="mySubmit">
<p>Click the "Try it" button to display the value of the name attribute of the Submit button.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
  var x = document.getElementById("mySubmit").name;
  document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>