<!--
var isLayer = 'nada';

function killLayer(isLayer)	{

	if(isLayer != 'nada') {
		switch(navigator.family)
		{
		case 'nn4':
		  document.layers[isLayer].visibility = 'hidden';
		  isLayer = thisLayer;
		  break;
		case 'ie4':
		  //document.all[isLayer].style.visibility = 'hidden';
		  break;
		case 'gecko':
		  var myElement = document.getElementById(isLayer);
		  myElement.style.visibility = "hidden";
		  isLayer = thisLayer;
		  break;
		case 'opera':
		  var myElement = document.getElementById(isLayer);
		  myElement.style.visibility = "hidden";
		  isLayer = thisLayer;
		  break;
		}
	}
}

function showLayer(isLayer)	{

	if(isLayer != 'nada') {
		switch(navigator.family)
		{
		case 'nn4':
		  document.layers[isLayer].visibility = 'visible';	
		  break;
		  isLayer = thisLayer;
		case 'ie4':
		  //document.all[isLayer].style.visibility = 'visible';
		  break;
		case 'gecko':
		  var myElement = document.getElementById(isLayer);
		  myElement.style.visibility = "visible";
		  isLayer = thisLayer;
		  break;
		case 'opera':
		  var myElement = document.getElementById(isLayer);
		  myElement.style.visibility = "visible";
		  isLayer = thisLayer;
		  break;
		}
	}
}
-->