jQuery(document).ready(function(){
    var message = 'You are now leaving the Australian Government website for the Department of Broadband, Communications and the Digital Economy.';
    jQuery('a[href^="http"]').not('[href*=".gov.au"]').click(function(){
        alert(message);
    });
    jQuery('a[href^="http://www.dbcde.gov.au/newsroom/news_and_events/current/national_broadband_network_coverage_maps"]').click(function(){
        alert(message);
    });
});