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;
	  // HIDE the layer
	  vis.display = 'none';
	};

	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;
	  // HIDE the layer
	  vis.display = 'block';
	};
// JavaScript Document