var
  base = 'http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&term=',
  tag1 = '[mh]',
  tag2 = '[au]',
  lr = 'Optical Illusions[mh] 2000[dp]';

function j1(o)
  {
  var term = o.firstChild.data + tag1 + ' ' + lr;
  var url = base + encodeURIComponent(term).replace(/%20/g, '+');
  window.open(url, '_blank');
  return false;
  }

function j2(o)
  {
  var term = o.firstChild.data + tag2 + ' ' + lr;
  var url = base + encodeURIComponent(term).replace(/%20/g, '+');
  window.open(url, '_blank');
  return false;
  }

function jc1(o)
  {
  var term = o.parentNode.title.split(' + ');
  term = term[0] + tag1 + ' ' + term[1] + tag1 + ' ' + lr;
  var url = base + encodeURIComponent(term).replace(/%20/g, '+');
  window.open(url, '_blank');
  return false;
  }

function jc2(o)
  {
  var term = o.parentNode.title.split(' + ');
  term = term[0] + tag1 + ' ' + term[1] + tag2 + ' ' + lr;
  var url = base + encodeURIComponent(term).replace(/%20/g, '+');
  window.open(url, '_blank');
  return false;
  }

function j(o)
  {
  var term = o.firstChild.data;
  var url = base + term;
  window.open(url, '_blank');
  return false;
  }