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<!DOCTYPE html>
<html>
<body>
E-mail: <input type="email" id="myEmail" name="usremail">
<p>Click the buttons to display and/or change the value of the name attribute of the email field.</p>
<button onclick="display()">Display name</button>
<button onclick="change()">Change name</button>
<script>
function display() {
  var x = document.getElementById("myEmail").name;
  alert("The name of the email field is: " + x);
}
function change() {
  var x = document.getElementById("myEmail").name = "newEmailName";
  alert ("The name was changed to: " + x);
}
</script>
</body>
</html>