function toggle_menu()
{
	var arbo = document.getElementById("arbo");
	var child_arbo = document.getElementById("child_arbo");
	var navigateur = navigator.appName;
	
	if (child_arbo.style.display == 'block')
	{		
		child_arbo.style.display='none';
	}
	else
	{
		child_arbo.style.display='block';
		
		child_arbo.style.top = (arbo.offsetTop -10)+"px";
		
		if(navigateur == "Netscape")
		{
			child_arbo.style.left = (arbo.offsetLeft+180)+"px";
		}
		else
		{
			child_arbo.style.left = (arbo.offsetLeft+155)+"px";
		}
	}
}


function display_haut(id)
{
	var arbo = document.getElementById("menunav" + id);
	var child_arbo = document.getElementById("sous-menunav" + id);
	var navigateur = navigator.appName;
	
	if (child_arbo.style.display == 'block')
	{
		
		/*if(navigateur == "Netscape")
		{
			child_arbo.style.left = (arbo.offsetLeft)+"px";
		}
		else
		{
			child_arbo.style.left = (arbo.offsetLeft)+"px";
		}*/
		
		child_arbo.style.display='none';
	}
	else
	{
		child_arbo.style.display='block';
		//child_arbo.style.top = (arbo.offsetTop + 5)+"px";
	}
}