<!DOCTYPE html>
<html>
<body>
<p>Click "Try it" to display all my children:</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var myGirls = ["Cecilie", "Lone"];
var myBoys = ["Emil", "Tobias", "Linus"];
var myChildren = myGirls.concat(myBoys);
document.getElementById("demo").innerHTML = myChildren;
}
</script>
</body>
</html>