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.png";
    menu1o = new Image;
    menu1o.src = "./images/menu1o.png";
	
    menu2 = new Image;
    menu2.src = "./images/menu2.png";
    menu2o = new Image;
    menu2o.src = "./images/menu2o.png";
	
    menu3 = new Image;
    menu3.src = "./images/menu3.png";
    menu3o = new Image;
    menu3o.src = "./images/menu3o.png";
	
    menu4 = new Image;
    menu4.src = "./images/menu4.png";
    menu4o = new Image;
    menu4o.src = "./images/menu4o.png";
	
    menu5 = new Image;
    menu5.src = "./images/menu5.png";
    menu5o = new Image;
    menu5o.src = "./images/menu5o.png";
}

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

function abrapsoBusca() {
	if (document.fbusca.termo.value=='') {
		alert("Digite a palavra-chave para efetuar a busca.");
		return false;
	}
	else {
		document.fbusca.action='busca.php';
		document.fbusca.submit();
	}
}