<!DOCTYPE html>
<html>
<body>
<p>Finding the largest number.</p>
<p id="demo"></p>
<script>
function findMax() {
var i;
var max = -Infinity;
for(i = 0; i < arguments.length; i++) {
if (arguments[i] > max) {
max = arguments[i];
}
}
return max;
}
document.getElementById("demo").innerHTML = findMax(4, 5, 6);
</script>
</body>
</html>