function now_show(obj){
    now_hide('drop_down1');
    now_hide('drop_down2');
    document.getElementById(obj).style.display = "block";
}

function now_hide(obj){
    document.getElementById(obj).style.display = "none";
}

function now_hideall(){
    now_hide('drop_down1');
    now_hide('drop_down2');
}

function now_goto(link){
    document.location.href = link; 
}