function performAction(sel)
{
  if(sel.value!='-')
  {
    eval(sel.value);
  }
  sel.selectedIndex = 0;
}

function checkAllItems()
{
  var checks = document.all("itemschecked");
  if(typeof(checks) == 'undefined') return;

  checkedAllItems = !checkedAllItems;
  
  if(checks.length > 0)
  {
    for (var b = 0; b < checks.length; b++)
    {
      if(checkedAllItems == true)
        checks[b].checked = true;
      else
        checks[b].checked = false;
    }
  }
  else
  {
    if(checkedAllItems == true)
      checks.checked = true;
    else
      checks.checked = false;
  }
  
  var buttons = document.all("checkItemsButton");
  if(typeof(buttons) == 'undefined') return;
  if(buttons.length > 0)
  {
    for (var b = 0; b < buttons.length; b++)
    {
      if(checkedAllItems == true)
        buttons[b].value = '[  ]';
      else
        buttons[b].value = '[X]';
    }
  }
  else
  {
    if(checkedAllItems == true)
      buttons.value = '[  ]';
    else
      buttons.value = '[X]';
  }

}