var noCookie = (!document.cookie);
var oldBrowser = (!document.getElementById);

document.write('<link href="main.css" type="text/css" title="Lisa" rel="' + (((document.cookie.indexOf('style=main.css')>=0) || (noCookie && !oldBrowser)) ? '' : 'alternate ') + 'stylesheet">\n');
document.write('<link href="Alt1.css" type="text/css" title="Negra" rel="' + ((document.cookie.indexOf('style=Alt1.css')>=0) ? '' : 'alternate ') + 'stylesheet">\n');
document.write('<link href="main_old.css" type="text/css" title="FCP" rel="' + (((document.cookie.indexOf('style=main_old.css')>=0) || (noCookie && oldBrowser)) ? '' : 'alternate ') + 'stylesheet">\n');
document.write('<link href="tabbedBlue.css" type="text/css" title="Tabulado Azul" rel="' + (((document.cookie.indexOf('style=tabbedBlue.css')>=0) || (noCookie && oldBrowser)) ? '' : 'alternate ') + 'stylesheet">\n');

function chooseStyle (newstyle){
  var expdate = new Date();
  expdate.setTime(expdate.getTime() + (1000*3600*24*365));
  document.cookie = 'style=' + newstyle + '; expires=' + expdate.toGMTString() + ';';
  self.location = self.location;  
}