function toggleLayer( layer_ID , toggle_value)
{
  //note: toggle value = {"show", "show_inline", "hide"}
  var elem, vis;
  if( document.getElementById ) // this is the way the standards work
    elem = document.getElementById( layer_ID );
  else if( document.all ) // this is the way old msie versions work
      elem = document.all[layer_ID];
  else if( document.layers ) // this is the way nn4 works
    elem = document.layers[layer_ID];
  vis = elem.style;
  
  //this is old code
  // if the style.display value is blank we try to figure it out here
  //if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
    //vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
  //vis.display = (vis.display==''||vis.display=='block')?'none':'block';
  
  if (toggle_value == "show")
  	vis.display = 'block';
  else if (toggle_value == "show_inline")
  	vis.display = 'inline';
  else
  	vis.display = 'none';
}