function open(nr,status) {

if (document.layers)
{
	
	vista = (status == 'hide') ? 'none'		: 'block'
	document.layers[nr].display = vista;
}
else if (document.all)
{
	
	vista = (status == 'hide') ? 'none'	: 'block';
	document.all[nr].style.display = vista;
}

else if (document.getElementById)
{
	
	vista = (status == 'hide') ? 'none'	: 'block';
	document.getElementById(nr).style.display = vista;

}
}