function menu_exp(Obj,RowCount) {
    var Section = Obj.parentNode.parentNode;
    var RowStopper = Obj.parentNode.sectionRowIndex + RowCount +1;
    for(var i=Obj.parentNode.sectionRowIndex+1;i<RowStopper;i++) {
        Section.rows[i].className=(Section.rows[i].className == 'm0')?'':'m0';
    }
}