Event.observe(window, "load", LoadMembre, false);

function LoadMembre()
{
    var aNodes = $$("img.noeud");
    for( var idx=0; idx < aNodes.length; idx++ )
    {
        Event.observe(aNodes[idx], "click", onClickNoeud, false);
    }
}

function onClickNoeud(evt)
{
    var el = Event.element(evt);
    var tr = document.getElementById(el.id + "Ext");
    
    if( tr.style.display == "" || tr.style.display == "none" )
    {
        try
        {
            tr.style.display = "table-cell";
        }
        catch (e)
        {
            tr.style.display = "block";
        }
        el.src = "images/moins.gif";
    }
    else
    {
        tr.style.display = "none";
        el.src = "images/plus.gif";
    }
}