var intAdTimer;
var intAdTimeLeft = -1;

window.onload = startAdTimer;

function startAdTimer() {
	intAdTimer = setInterval (updateAdTimer, 50);
}

function updateAdTimer() {
	var divGameAd = document.getElementById('divGameAd');
	var divGameObject = document.getElementById('divGameObject');
	var divLoading = document.getElementById('divLoading');
	
	if (divGameAd == null || divGameObject == null) {
		// body not fully loaded yet
		return;
	}
	
	if (intAdTimeLeft == -1) {
		// body loaded
		intAdTimeLeft = 10;
		divGameObject.style.display = 'none';
		divGameAd.style.display = 'block';
		clearInterval (intAdTimer);
		intAdTimer = setInterval (updateAdTimer, 1000);
	}
		
	intAdTimeLeft--;
	if (intAdTimeLeft == 0) {
		divLoading.innerHTML = 'Loading...';
		clearInterval (intAdTimer);
		divGameAd.style.display = 'none';
		divGameObject.style.display = 'block';
	}
	
	//divLoading.innerHTML = intAdTimeLeft + ' second' + ((intAdTimeLeft == 1) ? '' : 's') +  ' left...';
	divLoading.innerHTML = 'Your game is loading! ' + intAdTimeLeft + ' second' + ((intAdTimeLeft == 1) ? '' : 's') +  ' left...';
}