function showandhide(h_id,hon_class,hout_class,c_id,totalnumber,activeno) {
    var h_id,hon_id,hout_id,c_id,totalnumber,activeno;
    for (var i=1;i<=totalnumber;i++) {
        document.getElementById(c_id+i).style.display='none';
        document.getElementById(h_id+i).className=hout_class;
    }
    document.getElementById(c_id+activeno).style.display='';
    document.getElementById(h_id+activeno).className=hon_class;
}