function op_win_u(fname,wname)
{
    window.open(fname, wname, "width=760, height=570,  status=no, resizable=no");
}

function op_win_conf(wtxt,gopage)
{
    if (confirm(wtxt)) {
        location.href = gopage;
    }
}

function op_win_alert(wtxt,gopage)
{
    alert(wtxt);
    location.href=gopage; 
}

function op_help(fname,wh)
{
    ohw=window.open(fname,"helpwin","width=200,status=no,resizable=yes");
    ohw.resizeTo(200,wh);
    ohw.focus();
}

function op_sample(fname)
{
    osw=window.open(fname,"samplewin","width=750,height=500,status=no,resizable=no,scrollbars=yes");
    osw.focus();
}