function submitNB() {
 // var dep = new Date( document.getElementById('arr_y').value, parseInt(document.getElementById('arr_m').value) - 1, parseInt(document.getElementById('arr_d').value) + parseInt(document.getElementById('nights').value) );
 url = 'https://booking.ihotelier.com/istay/istay.jsp?HotelId=73214&DateIn='
 + document.getElementById('arr_m').value + '/'
 + document.getElementById('arr_d').value + '/'
 + document.getElementById('arr_y').value
 + '&languageid=1&Length='
 + document.getElementById('nights').value
 + '&Adults='
+ document.getElementById('adults').value
+ '&Children='
+ document.getElementById('children').value

 window.open(pageTracker._getLinkerUrl(url));
 return false;
}