<html>
<body>
<input id="x" type="text"/>
<p>Content for on screen keyboard testing.</p>
</body>
<script>
var actionCount = 0;
function doAction() {
if (actionCount++ == 1) {
document.documentElement.requestFullscreen();
} else {
document.getElementById("x").focus();
}
}
document.addEventListener('click', function(e) { doAction(); }, false);
</script>
</html>