function expand(nr, me, menew) 
{

	if (document.layers)
 	{
		current = (document.layers[nr].display == 'none') ? 'block' : 'none';
	
		
		document.layers[nr].display = current;
		
		document.layers[me].display = 'none';
		document.layers[menew].display = 'block';
	
	}

	else if (document.all)
	{
		current = (document.all[nr].style.display == 'none') ? 'block' : 'none';
		
		
		document.all[nr].style.display = current;
		document.all[me].style.display = 'none';
		document.all[menew].style.display = 'block';
	}
	
	else if (document.getElementById)
	{
		vista = (document.getElementById(nr).style.display == 'none') ? 'block' : 'none';
		
		
		document.getElementById(nr).style.display = vista;
		document.getElementById(me).style.display = 'none';
		document.getElementById(menew).style.display = 'block';
	}
}