function esPCWin()
{
	if(navigator.userAgent.indexOf('Win') != -1)
	{
 		document.write("<LINK REL='STYLESHEET' TYPE='text/css' HREF='./estilos_pc.css'>");

		if (navigator.appName=='Microsoft Internet Explorer')
		{
			return true;
		}else{
			return false;
		}
	}
	else if(navigator.userAgent.indexOf('Mac') != -1)
	{
		return false;
	}
}

;(function(window){
    var
     $_GET = window.$_GET = {},
     $_VAN = window.$_VAN = {},
     location = window.location,
     search = location.search,
     href = location.href, 

     index = search.indexOf('?') != -1 ? search.indexOf('?') + 1 : 0,
     get = search.substr(index).split('&'),
     vanity = href.replace(/^https?:\/\/(.*?)\//i, '').replace(/\?.*$/i, '').split('/'); 

     for (var i in get){
     var split = get[i].split('=');
     $_GET[split[0]] = split[1]||null;
     }
     for (var i in vanity)
     $_VAN[i] = vanity[i]||null;
    })(window);
    // Modo de uso