I am trying to add up 3 input elements of type number. This doesn't work for some reason. When I take out the if statements, it works, but only after I change the first one (score1). When I change the others, nothing happens. Thanks.
function getTotal() {
var score1 = document.getElementById("score1");
var score2 = document.getElementById("score2");
var score3 = document.getElementById("score3");
var sc1 = parseInt(score1.value);
var sc2 = parseInt(score2.value);
var sc3 = parseInt(score3.value);
if (isNan(sc1)) {
sc1 = 0;
}
if (isNan(sc2)) {
sc2 = 0;
}
if (isNan(sc3)) {
sc3 = 0;
}
var total = sc1 + sc2 + sc3;
document.getElementById("totalScore").innerHTML = total;
}
function assign() {
var score1 = document.getElementbyId("score1");
var score2 = document.getElementbyId("score2");
var score3 = document.getElementbyId("score3");
score1.onchange = getTotal;
score2.onchange = getTotal;
score3.onchange = getTotal;
}
<!DOCTYPE html>
<html>
<head>
<script src="getTotal.js" type="text/javascript"></script>
</head>
<body>
<header>
<tbody>
<tr>
<td>
Total:
<output id="total" class="totalScore"></output>
</td>
</tr>
</tbody>
</header>
<table>
<tbody>
<td>Score 1</td>
<td><input type="number" id="score1"/></td>
<td>Score 2</td>
<td><input type="number" id="score2" /></td>
<td>Score 3</td>
<td><input type="number" id="score3" /></td>
</tbody>
</table>
<script type="text/javascript">assign();</script>
</body>
</html>
