// Calculates the GMT offset in the browser
     
function getGMTOffset()
{
  var rightNow = new Date();
  var date1 = new Date(rightNow.getFullYear(), 0, 1, 0, 0, 0, 0);
  var temp = date1.toGMTString();
  var date3 = new Date(temp.substring(0, temp.lastIndexOf(" ")-1));
  var hoursDiffStdTime = (date1 - date3) / (1000 * 60 * 60);

  return hoursDiffStdTime;
}