function fechar(){
document.getElementById("nav").style.visibility="hidden";
}
function Desaparecer(v){
        if(navigator.appName=="Microsoft Internet Explorer"){
                if (document.getElementById(v).style.visibility="visible"){
                        document.getElementById(v).filters[0].Apply();
                        document.getElementById(v).style.visibility="hidden";
                        document.getElementById(v).filters[0].Play();
                }
        }
        if(navigator.appName=="Netscape"){
                if (document.getElementById(v).style.visibility="visible"){
                        document.getElementById(v).style.visibility="hidden";
                }
        }
}

<!--
    function browserCheck() {

 //_______________ NETSCAPE ___________________
 if (navigator.appName=="Netscape"){

     //............  Netscape Version 4.0............
     if (navigator.appVersion.substring(0, 1) == "4") return "3.0"

     //............  Netscape Version 3.0............
     else if (navigator.appVersion.substring(0, 1) == "3") return "3.0"

     //............  Netscape Version 2.0 ou menor............
     else return "2.0" //  netscape 2 or less

     }

 //_______________ MICROSOFT IE ___________________
 else {
    //............  MS IE Version 4.0............
    if (navigator.appVersion.substring(0, 1) == "4") return "3.0"

    //............ MS IE Version 3.0............
    else return "2.0" // ver 3

    }

}


// Com o Browser reconhecido vamos alocar as imagens para os
//  eventos OnMouseOver e OnMouseOut

      if(browserCheck() == "3.0") {
        window.onerror = null

        vetor1 = new Array(6);
        vetor2 = new Array(6)

        vetor1[0] = new Image(200,54);
        vetor1[0].src = "pou_h1.gif";

        vetor1[1] = new Image(200,54);
        vetor1[1].src = "por1.gif";

        vetor1[2] = new Image(200,54);
        vetor1[2].src = "tar_f1.gif";

        vetor1[3] = new Image(200,54);
        vetor1[3].src = "res_i1.gif";


                //divisão das imagens

        vetor2[0] = new Image(200,54);
        vetor2[0].src = "pou_h2.gif";

        vetor2[1] = new Image(200,54);
        vetor2[1].src = "por2.gif";

        vetor2[2] = new Image(200,54);
        vetor2[2].src = "tar_f2.gif";

        vetor2[3] = new Image(200,54);
        vetor2[3].src = "res_i2.gif";


     }

       function  Muda_Imagem_Over(imagem)
       {
            if(browserCheck() == "3.0") {
                if (imagem==1) document.anim1.src = vetor2[0].src;
                if (imagem==2) document.anim2.src = vetor2[1].src;
                if (imagem==3) document.anim3.src = vetor2[2].src;
                if (imagem==4) document.anim4.src = vetor2[3].src;


            }
                }


        function  Muda_Imagem_Out(imagem)
        {
              if(browserCheck() == "3.0") {
                if (imagem==1) document.anim1.src = vetor1[0].src;
                if (imagem==2) document.anim2.src = vetor1[1].src;
                if (imagem==3) document.anim3.src = vetor1[2].src;
                if (imagem==4) document.anim4.src = vetor1[3].src;

              }
                }

// -->
function NS3() {
if ((navigator.appName.indexOf("Netscape") != -1) && (navigator.appVersion.indexOf("3.") != -1))
return true ;
else
  return false ;
}

function IE30 () {
if (navigator.userAgent.indexOf("MSIE 3.") != -1)
  return true ;
else
  return false ;
}

function stopError() {
            return true;
}

window.onerror = stopError;

var w1;
function openFotos(foto,largura,altura,alt)
{
        if (NS3()){
        // Netscape 3.xx
        w1 = window.open("","w1","scrollbars=no,width=" + largura + ",height=" + altura + "") ;
        self.w1.document.open();
        self.w1.document.write("<HTML><TITLE>Pousada do Frade</TITLE><BODY><CENTER>"+
        "<IMG BORDER=1 SRC='"+foto+"' ALT="+alt+" VALIGN=TOP ALIGN=LEFT></CENTER>"+
        "</BODY></HTML>"); 
        self.w1.document.close();
        self.w1.focus();
        }
        else
        {
        
        if (IE30()){
        w1 = window.open("","w1","scrollbars=no,width=" + largura + ",height=" + altura + "") ;
        w1.document.open();
        w1.document.write("<HTML><TITLE>Pousada do Frade</TITLE><BODY topmargin='0' leftmargin='0'><CENTER>"+
        "<A HREF=# onclick=window.top.close()><IMG BORDER=1 SRC='http://www.pousadadofrade.com.br" + alt + "' ALT="+foto+" VALIGN=TOP ALIGN=CENTER></A></CENTER>"+
        "</BODY></HTML>"); 
        w1.document.close()
        } 
        else
        {
        var x = 0
        var y = 0
        x = (screen.width - (520+9)) / 2
        y = (screen.height - (420+50)) / 2      
        w1 = window.open("","w1","scrollbars=no,status=no,toolbar=no,location=no,menu=-no,width=" + largura + ",height=" + altura + ",screenX=" + x + ",screenY=" + y + ",left=" + x + ",top=" + y);    
        self.w1.document.open();
        self.w1.document.write("<HTML><TITLE>Pousada do Frade</TITLE><BODY BGCOLOR='White' topmargin='0' leftmargin='0'></center><TABLE cellpadding='0' cellspacing='0'width=100%><TR WIDTH=100%><TD bgcolor='white' WIDTH=100%>"+
        "<IMG BORDER=0 SRC='"+foto+"' ALT='"+alt+"' VALIGN=TOP ALIGN=left><P></td></tr><td align=center><font size='-2' color='Navy' face='Verdana,Arial'><B>"+alt+"</B></td>"+
        "<TR><TD bgcolor='white' align='right' WIDTH=100%><A HREF=# onclick=self.window.close()><img src='fechar.gif' border=0 ></A></TD></TR></TABLE></center></BODY></HTML>"); 
        self.w1.document.close();
        self.w1.moveTo(x,y)     
        self.w1.focus();
        }       
}
}