(function (doc, win) {
	var docel = doc.documentelement,
	resizeevt = 'orientationchange' in window ? 'orientationchange' : 'resize',
	recalc = function () {
		var clientwidth = docel.clientwidth;
		if (!clientwidth) return;
		if (clientwidth >= 1200) {
			docel.style.fontsize = '100px';
		} else if (clientwidth >= 1000) {
			docel.style.fontsize = 100 * (clientwidth / 1200) + 'px';
		} else if (clientwidth > 750 && clientwidth < 1000) {
			docel.style.fontsize = 100 * (1000 / 1200) + 'px';
		} else if (clientwidth <= 750) {
			docel.style.fontsize = 100 * (clientwidth / 750) + 'px';
		}
	};

	if (!doc.addeventlistener) return;
	win.addeventlistener(resizeevt, recalc, false);
	doc.addeventlistener('domcontentloaded', recalc, false);
})(document, window);