var submit_ok;
var send_submit;
submit_ok=false;
send_submit=false;
function safe_submit()
{
    if(submit_ok) {
        if(send_submit) {
            return false;
        }
        else {
            send_submit = true;
            return true;
        }
    }
    else {
//        alert('aint submit');
        return false;
    }
}

function change_submit_ok()
{
//    alert('submit_ok');
    submit_ok=true;
}

//document.forms[0].onsubmit=safe_submit();
//window.onload=change_submit_ok();