var boton="x";
var root="../media/cuadro";
var root_fin=".gif";


agent=navigator.userAgent;
browser_version=2;
if (navigator.appVersion.substring(0,1)< "3")
  browser_version = 2; 
else 
  browser_version = 1; 
if (browser_version == 1){

a1on = new Image(115,16); a1on.src ="../media/portada/i_precisa_2.gif";
a2on = new Image(115,24); a2on.src ="../media/portada/i_selec_2.gif";
a3on = new Image(912,23);   a3on.src ="";
a4on = new Image(135,23); a4on.src ="../media/portada/i_inter_2.gif";
a5on = new Image(135,23); a5on.src ="../media/portada/i_obten_2.gif";
a6on = new Image(135,23); a6on.src ="../media/portada/i_citar_2.gif";
/*****/
a7on = new Image(135,23); a7on.src ="../media/otro_f2.gif";
a8on = new Image(51,23); a8on.src ="../media/glosa_f2.gif";
a9on = new Image(135,23); a9on.src ="../media/mapa_f2.gif";
a10on = new Image(135,23);a10on.src ="../media/arroba_f2.gif";
a11on = new Image(135,23);a11on.src ="../media/home_f2.gif";
a12on = new Image(77,23);a12on.src ="../media/compe_f2.gif";

a1off = new Image(115,16); a1off.src ="../media/portada/i_precisa.gif";
a2off = new Image(115,24); a2off.src ="../media/portada/i_selec.gif";
a3off = new Image(112,23); a3off.src ="";
a4off = new Image(135,23); a4off.src ="../media/portada/i_inter.gif";
a5off = new Image(135,23); a5off.src ="../media/portada/i_obten.gif";
a6off = new Image(135,23); a6off.src ="../media/portada/i_citar.gif";
/****/
a7off = new Image(135,23); a7off.src ="../media/otro.gif";
a8off = new Image(51,23); a8off.src ="../media/glosa.gif";
a9off = new Image(135,23); a9off.src ="../media/mapa.gif";
a10off = new Image(135,23); a10off.src ="../media/arroba.gif";
a11off = new Image(135,23); a11off.src ="../media/home.gif";
a12off = new Image(77,23);a12off.src ="../media/compe.gif";


}

function ac(imgName)
{ if (browser_version == 1)
  { imgOn = eval(imgName + "on.src");
    document [imgName].src = imgOn;
  }

}

function des(imgName)
{ if (browser_version == 1)
  { if (boton !=imgName)
   { imgOff = eval(imgName + "off.src");
      document [imgName].src = imgOff;
    }
  }
}
function elegido(imgName)
{ if (browser_version == 1)
  { var aux=boton;
    boton=imgName
    if (aux !="x")
    { des(aux);

    }
  }
}