function sendMail() {
    features = "width=150,"
             + "height=50,"
             + "toolbar=no,"
             + "location=no,"
             + "status=no,"
             + "menubar=no,"
             + "scrollbars=no,"
             + "top="+(window.screen.height-50)/2+","
             + "left="+(window.screen.width-150)/2;
    window.open('/etaf/thanks.html','swd_form',features);
}