function tab_menu_div(tab_id, tabs, t, tab_obj){
    for(var i = 1; i <= tabs; i++) {
        eval("document.getElementById('tab"+tab_id+i+"')").style.display="none";
        if ( t == i ) {
            eval("document.getElementById('tab"+tab_id+i+"')").style.display="block";
        }
        eval("document.getElementById('tabmenu"+tab_id+i+"')").className=""
    }
    tab_obj.className="current"
}