function checkBrowserWidth() {
	var theWidth = getBrowserWidth();

	if (theWidth > 800)
		setStylesheet("Version1");
	else
		setStylesheet("Version2");
	
	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;
}

function setStylesheet(styleTitle){	
	var currTag;
	if (document.getElementsByTagName)
		for (var i = 0; (currTag = document.getElementsByTagName("link")[i]); i++)
			if (currTag.getAttribute("rel").indexOf("style") != -1 && currTag.getAttribute("title")) {
				currTag.disabled = true;
				if(currTag.getAttribute("title") == styleTitle) {
					currTag.disabled = false;
				}
			}
	return true;
}

function seleccion(a) {
                var x=document.getElementById(a)
                self.location='temas.html?seleccion=' + x.innerHTML;
}