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

function getActiveStyleSheet()
{
	var i, a;
	for (i = 0; (a = document.getElementsByTagName("link")[i]); i++) {
		if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) {
			return a.getAttribute("title");
		}
	}
	return null;
}

function getPreferredStyleSheet()
{
	var i, a;
	for ( i = 0; (a = document.getElementsByTagName("link")[i]); i++) {
		if (a.getAttribute("rel").indexOf("style") != -1
				&& a.getAttribute("rel").indexOf("alt") == -1
				&& a.getAttribute("title")){
			return a.getAttribute("title");
		}
	}
	return null;
}

function createCookie(name,value,days)
{
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	} else {
		expires = "";
	}
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for (var i = 0; i < ca.length; i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') {
			c = c.substring(1,c.length);
		}
		if (c.indexOf(nameEQ) == 0) {
			return c.substring(nameEQ.length,c.length);
		}
	}
	return null;
}

window.onload = function(e)
{
	var cookie = readCookie("style");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

window.onunload = function(e)
{
	var title = getActiveStyleSheet();
	createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);

function mostrarFecha()
{
		var mes;
		months = new Array("Enero","Febrero","Marzo","Abril","Mayo","Junio","Julio","Agosto","Septiembre","Octubre","Noviembre","Diciembre");
		now = new Date();
		d = now.getDate();
		m = now.getMonth();
		h = now.getTime();
		y = now.getFullYear();
		mes =parseInt(m)
		mes = mes + 1
		if (d < 10) {
			d = "0" + d;
		}	
		if (mes < 10) {
			mes = "0" + mes;
		}	
		
		document.write(d + "/" + mes + "/" + y);
}