nvbtxtcoloff='#A7C3DE';
nvbbkgcoloff='#01588D';
nvbtxtcolon='#FFFFFF';
nvbbkgcolon='#6B9BC3';

navbarimgs= new Array(2);
navbarimgs['l'] = new Array(2);
navbarimgs['r'] = new Array(2);

function prld_nvb_img(rootdir) {
  if (!document.images) return false;
  left_on   = new Image(10,10);
  left_off  = new Image(10,10);
  right_on  = new Image(10,10);
  right_off = new Image(10,10);
  left_on.src   = rootdir+'img/nvbbtnlon.gif';
  left_off.src  = rootdir+'img/blank.gif';
  right_on.src  = rootdir+'img/nvbbtnron.gif';
  right_off.src = rootdir+'img/blank.gif';
  navbarimgs['l']['on']  = left_on;
  navbarimgs['l']['off'] = left_off;
  navbarimgs['r']['on']  = right_on;
  navbarimgs['r']['off'] = right_off;
  return true;
}

function cb(objname) {
  o = false;
  if (document.layers) {
    if (document.layers[objname]) {
      o = document.layers[objname];
    }
  }
  else if (document.all) {
    if (document.all[objname]) {
      o = document.all[objname].style;
    }
  }
  return o;
}

function btnon(n) {
  /* *** images *** */
  i1=document.images['nvb_btn'+n+'_l'];
  i2=document.images['nvb_btn'+n+'_r'];
  /* *** table *** */
  t=cb("nvb_btn"+n);
  /* *** link *** */
  l=cb("nvb_btn"+n+"_lnk");
  /* *** *** *** */
  i1.src=navbarimgs['l']['on'].src;
  i2.src=navbarimgs['r']['on'].src;
  t.color=nvbtxtcolon;
  t.backgroundColor=nvbbkgcolon;
  l.color=nvbtxtcolon;
  l.backgroundColor=nvbbkgcolon;
//  eval ("nvb_btn"+n+"_lnk.style.color='"+nvbtxtcolon+"'");
  return true;
}
function btnoff(n) {
  /* *** images *** */
  i1=document.images['nvb_btn'+n+'_l'];
  i2=document.images['nvb_btn'+n+'_r'];
  /* *** table *** */
  t=cb("nvb_btn"+n);
  /* *** link *** */
  l=cb("nvb_btn"+n+"_lnk");
  /* *** *** *** */
  i1.src=navbarimgs['l']['off'].src;
  i2.src=navbarimgs['r']['off'].src;
  t.color=nvbtxtcoloff;
  t.backgroundColor=nvbbkgcoloff;
  l.color=nvbtxtcoloff;
  l.backgroundColor=nvbbkgcoloff;
//  eval ("nvb_btn"+n+"_lnk.style.color='"+nvbtxtcoloff+"'");
  return true;
}