attachEventListener(window, "resize", checkBrowserWidth, false);

function checkBrowserWidth() {
	var theSetWidth = 985;
	var theWidth = getBrowserWidth();
	var container = document.getElementById("wrapper");

	if (theWidth > theSetWidth)	{
		container.className = null;
	}
	else {
		container.className = "narrow";
	}
	return true;
};

function getBrowserWidth() {
	if (window.innerWidth) {
		return window.innerWidth;
	}
	else if (document.documentElement && document.documentElement.clientWidth != 0) {
		return document.documentElement.clientWidth;
	}
	else if (document.body) {
		return document.body.clientWidth;
	}
	return 0;
};

Event.onDOMReady(function() { new checkBrowserWidth() });