function showCats()
{
	var cb = document.getElementsByName('catdiv');
 	for(var i=0; i<cb.length; i++)
	{	  	
   if (cb[i].style.display == 'block')
   	  cb[i].style.display = 'none';
   else
   	  cb[i].style.display = 'block'; 
	}  

}

function showKeys()
{
  if (document.getElementById('kwdiv').style.display == 'block')
    document.getElementById('kwdiv').style.display='none';
  else
    document.getElementById('kwdiv').style.display='block';
}

function showRelated()
{
  if (document.getElementById('related').style.display == 'block')
    document.getElementById('related').style.display='none';
  else
    document.getElementById('related').style.display='block';
}