$(document).ready(function() {
  $('a.speedbump').click(function(event) {
    event.preventDefault()
    var url = $(this).attr('href');
    var confirm_box = confirm('You are about to leave the official website for Astra Bank. Are you sure you wish to leave this site?');
    if (confirm_box) {
	window.open(url,'_blank');
    }
  });
});