function expandLevel(level){    
	var container
	container = eval(level + '_container');
	img = eval(level + '_img');	
	if (container.style.display == 'none')
	{
	    container.style.display = 'block';
        img.src = 'images/minus.gif';    
	}
	else
    {
        container.style.display = 'none'
	    img.src = 'images/plus.gif';            
    }
}

function setMenu(level)
{
	img = eval(level + '_img');	
    container = eval(level + '_container');
    container.style.display = 'block';
	img.src = 'images/minus.gif';
}