$(document).ready(function() {

  $('.external').click(function() {
    var link = $(this).attr('href');

    $('<div>You are about to leave the Berkeley Jobs website to visit an external site.</div>').dialog({
      
	  title: "Leaving Berkeley Jobs website", 
      modal : true,
      overlay: {
        backgroundColor: '#ccc',
        opacity: 1.0
      },
      buttons: {
        'Cancel': function() {
          $(this).dialog('close').remove();
          return false;
        },
        'OK': function() {
          $(this).dialog('close').remove();
		  		window.open(link, '_self');
        }
      }
    } 
	
	);

    return false;
  });
});