function showLayer( whichLayer )
    {
      var elem, vis;
      if( document.getElementById ) // this is the way the standards work
        elem = document.getElementById( whichLayer );
      else if( document.all ) // this is the way old msie versions work
          elem = document.all[whichLayer];
      else if( document.layers ) // this is the way nn4 works
        elem = document.layers[whichLayer];
      vis = elem.style;
      // 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 = 'block'
      vis.display = 'block';
    }

    function hideLayer( whichLayer )
    {
      var elem, vis;
      if( document.getElementById ) // this is the way the standards work
        elem = document.getElementById( whichLayer );
      else if( document.all ) // this is the way old msie versions work
          elem = document.all[whichLayer];
      else if( document.layers ) // this is the way nn4 works
        elem = document.layers[whichLayer];
      vis = elem.style;
      // 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 = 'none';
      vis.display = 'none';
    }
    
    function toggleLayer( whichLayer )
    {
      var elem, vis;
      if( document.getElementById ) // this is the way the standards work
        elem = document.getElementById( whichLayer );
      else if( document.all ) // this is the way old msie versions work
          elem = document.all[whichLayer];
      else if( document.layers ) // this is the way nn4 works
        elem = document.layers[whichLayer];
      vis = elem.style;
      // 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';
    }

    function changetext(intext)
    {
        var obj = document.getElementById(intext);
        if(obj.innerHTML=='show')
        {
            obj.innerHTML = 'hide';
        }
        else
        {
            obj.innerHTML = 'show';
        }
    }