function MM_findObj(n, d) { //v4.01
    var p, i, x; if (!d) d = document; if ((p = n.indexOf("?")) > 0 && parent.frames.length) {
        d = parent.frames[n.substring(p + 1)].document; n = n.substring(0, p);
    }
    if (!(x = d[n]) && d.all) x = d.all[n]; for (i = 0; !x && i < d.forms.length; i++) x = d.forms[i][n];
    for (i = 0; !x && d.layers && i < d.layers.length; i++) x = MM_findObj(n, d.layers[i].document);
    if (!x && d.getElementById) x = d.getElementById(n); return x;
}

function openCategoryChangeLinkText(link) {
    var obj = MM_findObj(link);
    if (obj.className == 'cat_link2 opened') obj.className = 'cat_link2 closed';
    else if (obj.className == 'cat_link2 closed') obj.className = 'cat_link2 opened';
}