Starter Code: You need to fix this up to make it work:
<!DOCTYPE html>
<html>
<body>
<form>
<hr>
<label for="inputa">Input A:</label>
<input type="text" id="inputa" >
<hr>
<label for="inputa">Input B:</label>
<input type="text" id="inputb" >
<hr>
<label for="inputa">Output:</label>
<input type="text" id="output" >
<hr>
</form>
<button id="addButton">Add</button>
<script>
document.getElementById("addButton").addEventListener("click", function()
{
var inputA = parseFloat(document.getElementById("inputa").value);
var inputB = parseFloat(document.getElementById("inputb").value);
var output = inputA + inputB;
document.getElementById("output").value = output;
});
</script>
</body>
</html>