function _confirm( title, msg, b1, b2, ok_action )
{
    var win =  buildWindow('confirm', 360, 320);
    win.hdr.left.innerHTML = title;
    
    var f = ce('form');
    f.action = "";

    var p1 = ce('p');
    
    p1.innerHTML = msg;
    
    var b;
    f.appendChild(p1);
    f.appendChild(ce('br'));

    f.appendChild(b = addButton(b1, 'b100', 'submit', ok_action ));   b.style.marginRight = '12px' 
    f.appendChild(b = addButton(b2, 'b100', 'button', win.close ));   b.style.marginRight = '12px';

    win.body.style.textAlign='center';
    win.body.appendChild(f);
    var lp = ce('div'); lp.style.height='1px'; win.body.appendChild(lp);
    
    sh(win);
    ajustWindow(win, 'auto', lp);

}