var pcat = new Array('pc_nws', 'pc_art', 'pc_ir', 'pc_nws');
function pc_ch(a) {
    for (var i = 0; i < pcat.length - 1; i++) {
        $(pcat[i]).className = 'flo nws_mnu_it';
    }
    $(a).className = 'flo nws_mnu_sel';
    if (a == pcat[0] || a == pcat[1]) {
        Pco.UI.Style.FadeOut(pcat[3] + '_itm');
        s(pcat[3] + '_itm').zIndex = 1;
        Pco.UI.Style.FadeIn(a + '_itm');
        s(a + '_itm').zIndex = 2;
        pcat[3] = a;
        
    }

}