browserName = navigator.appName;
  browserVer = parseInt(navigator.appVersion);

  if ((browserName == "Netscape" && browserVer >= 3) || browserVer >= 4) 
    versao ="n3";
  else 
    versao = "n2";
  
  if (versao == "n3") {

    menu1 = new Image;
    menu1.src = "./images/menu1.gif";
    menu1o = new Image;
    menu1o.src = "./images/menu1o.gif";
    menu1sel = new Image;
    menu1sel.src = "./images/menu1sel.gif";
	
    menu2 = new Image;
    menu2.src = "./images/menu2.gif";
    menu2o = new Image;
    menu2o.src = "./images/menu2o.gif";
    menu2sel = new Image;
    menu2sel.src = "./images/menu2sel.gif";
	
    menu3 = new Image;
    menu3.src = "./images/menu3.gif";
    menu3o = new Image;
    menu3o.src = "./images/menu3o.gif";
    menu3sel = new Image;
    menu3sel.src = "./images/menu3sel.gif";
	
    menu4 = new Image;
    menu4.src = "./images/menu4.gif";
    menu4o = new Image;
    menu4o.src = "./images/menu4o.gif";
    menu4sel = new Image;
    menu4sel.src = "./images/menu4sel.gif";
	
    menu5 = new Image;
    menu5.src = "./images/menu5.gif";
    menu5o = new Image;
    menu5o.src = "./images/menu5o.gif";
    menu5sel = new Image;
    menu5sel.src = "./images/menu5sel.gif";
	
    menu6 = new Image;
    menu6.src = "./images/menu6.gif";
    menu6o = new Image;
    menu6o.src = "./images/menu6o.gif";
    menu6sel = new Image;
    menu6sel.src = "./images/menu6sel.gif";
}

function op(Name,Img) {
	if (versao == "n3")
		document.images[Name].src = eval(Img + ".src")
}

function ma_janela(url,largura,altura,scrollflag,janela)
{
	var posicaoX = screen.width - largura;
	var posicaoY = screen.height - altura;
	if(posicaoX != 0)
	{
		posicaoX = Math.round(posicaoX / 2);
		posicaoY = Math.round(posicaoY / 2);
	}
	pop = window.open(url,janela,"toolbar=no,location=no,address=no,directories=no,status=no,menubar=no,scrollbars="+scrollflag+",resizable=no,copyhistory=yes,maximized=yes,width="+largura+",height="+altura+",left="+posicaoX+",top="+posicaoY);
}