var style = "default";       // title del css di default

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

function loadStyle() {
}

function setStyle(s) {
  if (s != style) {
    switchStyle(s);
    style = s;
  }
}

loadStyle(); // carica lo style swichter subito


// Stylesheet per Netscape 4
// necessita di un css a parte
if(document.layers)
  document.writeln("<link rel='stylesheet' type='text/css' href='/nn4.css' />");