function doNav(num) {
  stofind = "isasaleon.com.mx"; // Directorio Raíz, puede ser "dominio.com"
  baseurl = "";
  site="isasa";
  getBaseUrl();
  maxbt = 6;

// ##### En esta sección se definen los botones de las secciones principales
  txt = new Array();  // Identificadores para botones
  lnk = new Array();  // Páginas de destino
  dim = new Array();  // Dimensiones de los botones
  for (i=1; i<=maxbt; i++) {
    txt[i] = "";
    lnk[i] = "";
  }
  txt[1] = "ini";
  txt[2] = "pro";
  txt[3] = "srv";
  txt[4] = "tec";
  txt[5] = "con";
  txt[6] = "nos";

  lnk[1] = baseurl + "inicio.htm";
  lnk[2] = baseurl + "productos/index.htm";
  lnk[3] = baseurl + "servicio.htm";
  lnk[4] = baseurl + "soporte.htm";
  lnk[5] = baseurl + "contacto.htm";
  lnk[6] = baseurl + "nosotros.htm";

  dim[1] = " width=55 height=18 border=0";
  dim[2] = " width=62 height=18 border=0";
  dim[3] = " width=58 height=18 border=0";
  dim[4] = " width=96 height=18 border=0";
  dim[5] = " width=76 height=18 border=0";
  dim[6] = " width=70 height=18 border=0";

  imgn = new Array();
  imgp = new Array();
  for (i=1; i<=maxbt; i++) {
    imgn[i] = new Image();
    imgn[i].src = baseurl + "images/btn" + txt[i] + ".gif";
    imgp[i] = new Image();
    imgp[i].src = baseurl + "images/btp" + txt[i] + ".gif";
    if (i==num) {
      imgn[i].src = baseurl + "images/bta" + txt[i] + ".gif";
    }
  }

// ##### En esta sección se definen los links de texto
  maxver = maxbt;
  ver1 = new Array();
  ver1[1] = lnk[1];
  ver1[2] = lnk[2];
  ver1[3] = lnk[3];
  ver1[4] = lnk[4];
  ver1[5] = lnk[5];
  ver1[6] = lnk[6];

  ver2 = new Array();
  ver2[1] = "Principal";
  ver2[2] = "Productos";
  ver2[3] = "Servicios";
  ver2[4] = "Soporte Técnico";
  ver2[5] = "Contáctenos";
  ver2[6] = "La Empresa";

// ####### Crear barra de navegación
  if(num==-1) {
    return;
  }

  document.write('<img src="' + baseurl + 'images/bt_izq.gif" width=80 height=18>');
  for (j=1; j<=maxbt; j++) {
    document.write('<a href="' + lnk[j]+ '" onMouseOver="changeImages(' + "'" + txt[j] + "','" + imgp[j].src + "')" + '" onMouseOut="changeImages(' + "'" + txt[j] + "','" + imgn[j].src + "')" +'">');
    if (j==num) {
      document.write('<img src="' + baseurl + 'images/bta' + txt[j] + '.gif" name=' + txt[j] + dim[j] +'></a>');
    } else {
      document.write('<img src="' + baseurl + 'images/btn' + txt[j] + '.gif" name=' + txt[j] + dim[j] +'></a>');
    }
  } // #### for j
  document.write('<img src="' + baseurl + 'images/bt_der.gif" width=5 height=18>');

}

function doInf() {
  document.writeln('<table border=0 cellspacing=0 cellpadding=2 width=740><tr>');
  document.writeln('<td background="' + baseurl + 'images/fclaro.gif" align=center><font face=verdana size=1 class=f8><b>');

  for(j=1; j<=maxver; j++) {
    document.writeln('[<a href="' + ver1[j] +'">' + ver2[j] + '</a>]');
  }

  document.writeln('</b></font></td></tr>');
  document.writeln('<tr><td align=center><font face=arial size=2 class=f10><b>Instrumentación y Servicios Analíticos, S.A. de C.V.</b><br>');
  document.writeln('Chimalpopoca No. 133 • Col. Azteca • León 37520 Gto., México • Tel.: 01 (477) 711 91 26 • Fax: 01 (477) 711 25 29<br>');
  document.writeln('Copyright &copy; Todos los derechos reservados.</font></td></tr>');
  document.writeln('<tr><td bgcolor=#f5eeff align=center><font face=verdana size=1 class=f8 color=#6f6677>Desarrollo y producción a cargo de');
  document.writeln('<a href="http://www.aisms.com" class=fa><b>Asesoría Integral - Servicios Multi Soluciones</b></a>.</font></td></tr></table>');
}


function changeImages() {
  if (document.images) {
    document[changeImages.arguments[0]].src = changeImages.arguments[1];
  }
}


function getBaseUrl() {
  igual=1;
  docpath=document.location.pathname;
  x=docpath.indexOf(stofind);
  for (i=0; i< stofind.length; i++) {
    if (docpath.substring(x+i,x+i+1) == stofind.substring(i,i+1)) { x=x;
    } else {
      baseurl="http://www.isasaleon.com.mx/";
      if (docpath.substring(0,baseurl.length) == baseurl) {
        docpath=docpath.substring(baseurl.length,docpath.length);
      }
      return;
    }
  }
  docpath=docpath.substring(x+stofind.length,document.location.pathname.length);
  docname=docpath;
  stofind="/";
  x=docname.indexOf(stofind);
  if (x<0) { 
     stofind="\\";
     x=docname.indexOf(stofind);
  }
  docname=docname.substring(x+1, docname.length);
  baseurl="";
  x=docname.indexOf(stofind);
  while (x >= 0) {
    docname=docname.substring(x+1, docname.length);
    baseurl= baseurl + "../";
    x=docname.indexOf(stofind);
  }
//  alert(baseurl + ' ' + docname);
}