<!DOCTYPE html>
<html>
<body>
<form>
<button id="buttonid" name="abcdefg" type="submit" value="The Button">The Button</button>
</form>
<br />
<button onclick="GetButtonName()">Get Button Name</button>
<p id="pid"></p>
<script>
function GetButtonName() {
var nm = document.getElementById("buttonid").name;
document.getElementById("pid").innerHTML = nm;
}
</script>
</body>
</html>