//------------------------------------------------------------------------
function layerHabilitado(layerName)
{
/*
  var is = new Is();
  if(is.nav) return eval("document.layers."+layerName+".visibility == 'show'");
    else return eval(layerName+".style.visibility == 'visible'");
*/
	document.getElementById(layerName).style.visibility = "visible";
}
//------------------------------------------------------------------------
function habilitaLayer(layerName) {
/*
  var is = new Is();
  if(is.nav) eval("document.layers."+layerName+".visibility = 'show'");
    else eval(layerName+".style.visibility = 'visible'");
*/
	document.getElementById(layerName).style.visibility = "visible";
}
//------------------------------------------------------------------------
function desabilitaLayer(layerName)
{
/*
  var is = new Is();
  if(is.nav) eval("document.layers."+layerName+".visibility = 'hide'");
    else eval(layerName+".style.visibility = 'hidden'");
*/
	document.getElementById(layerName).style.visibility = "hidden";
}
//------------------------------------------------------------------------
function moveLayer(layerName, top, left)
{
	var is = new Is();
	if (is.nav) {
		if (top != '') eval("document.layers."+layerName+".top =" + top);
		if (left != '') eval("document.layers."+layerName+".left =" + left);	
	}	
	else { 
		if (top != '') eval(layerName+".style.pixelTop =" + top);
		if (left != '') eval(layerName+".style.pixelLeft =" + left);		
	}
}