function expand(id, resizeBtn) {
  var tblEl1 = document.getElementById(id);
  tblEl1.style.display = '';
}

function collapse(id, resizeBtn) {
  var tblEl1 = document.getElementById(id);
  tblEl1.style.display = 'none';
}

function resize(id, resizeBtn) {
  var tblEl1 = document.getElementById(id);
  var tblEl2 = document.getElementById(resizeBtn);
  if(tblEl1.style.display == '') {
    collapse(id, resizeBtn);
    tblEl2.setAttribute('src', 'images/plus-btn.gif');
  }
  else {
    expand(id, resizeBtn);
    tblEl2.setAttribute('src', 'images/minus-btn.gif');
  }
}

function remove(id, resizeBtn) {
  collapse(id, resizeBtn);
}