checkbr = (parseInt(navigator.appVersion) > 2)?true:false;
	if (checkbr)
		{
		source = new Image();
		source.src = "img/quadrato_over.gif";
		sourceoff = new Image();
		sourceoff.src = "img/quadrato.gif";
		}
function swp(numero)
	{
	if (checkbr)
		{
		document.quadrato[numero].src=source.src;
		}
	}
function UNswp(numero)
	{
	if (checkbr)
		{
		document.quadrato[numero].src=sourceoff.src;
		}
	}
function Menu(links) {
	location.href = links[links.selectedIndex].value;
}