function MM_nbGroup(event, grpName) { //v3.0
    var i,img,nbArr,args=MM_nbGroup.arguments;
    if (event == "init" && args.length > 2) {
        if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
            img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
            if ((nbArr = document[grpName]) == null)
                nbArr = document[grpName] = new Array();
            nbArr[nbArr.length] = img;
            for (i=4; i < args.length-1; i+=2)
                if ((img = MM_findObj(args[i])) != null) {
                    if (!img.MM_up) img.MM_up = img.src;
                        img.src = img.MM_dn = args[i+1];
                    nbArr[nbArr.length] = img;
                }
        }
    } else if (event == "over") {
        document.MM_nbOver = nbArr = new Array();
        for (i=1; i < args.length-1; i+=3)
            if ((img = MM_findObj(args[i])) != null) {
                if (!img.MM_up) img.MM_up = img.src;
                img.src = (img.MM_dn && args[i+2]) ? args[i+2] : args[i+1];
                nbArr[nbArr.length] = img;
            }
    } else if (event == "out" ) {
        for (i=0; i < document.MM_nbOver.length; i++) {
            img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; 
        }
    } else if (event == "down") {
        if ((nbArr = document[grpName]) != null)
            for (i=0; i < nbArr.length; i++) {
                img=nbArr[i]; img.src = img.MM_up;
                img.MM_dn = 0;
            }
            document[grpName] = nbArr = new Array();
            for (i=2; i < args.length-1; i+=2)
                if ((img = MM_findObj(args[i])) != null) {
                    if (!img.MM_up) img.MM_up = img.src;
                    img.src = img.MM_dn = args[i+1];
                    nbArr[nbArr.length] = img;
                }
    }
}