window.onresize = function() {
	var baseElement = document.getElementById('base');
	var clientWidth = (self.innerWidth) ? self.innerWidth: document.body.clientWidth + 18;
	var leftOffset = (clientWidth - 1024) / 2;
	if (leftOffset < 0) leftOffset = 0;
	baseElement.style.left = 20 + leftOffset + 'px';
}

window.onresize();