function sm_is_visible(node)
{
 if(node)
 {
  if(node.style.visibility=='hidden' && node.style.display=='none')
  {
   return false;
  }
 }
 return true;
}

function sm_show(node)
{
 if(node)
 {
  node.style.visibility='';
  node.style.display='';
 }
}

function sm_hide(node)
{
 if(node)
 {
  node.style.visibility='hidden';
  node.style.display='none';
 }
}

function sm_open(node)
{
 if(node)
 {
  var name = new String(node.id);
  var elements = new Array();
  elements = name.split('_');
 
  var group_name = 'sm-group_'+elements[elements.length-1];
  var group_node = document.getElementById(group_name);
 
  if(!sm_is_visible(group_node))
  {
   sm_show(group_node);
  }
  else
  {
   sm_hide(group_node);
  }
 }
}