Open Links In New Window

add_action('wp_head', 'external_links_in_new_windows_client');
function external_links_in_new_windows_client()
{

  $blogdomain = parse_url(get_option('home'));
  echo "<script type=\"text/javascript\">//<![CDATA[";
  echo "
    function external_links_in_new_windows_loop() {
        if (!document.links) {
            document.links = document.getElementsByTagName('a');
        }
        var change_link = false;
        var force = '".get_option("external_links_in_new_windows_force")."';
        var ignore = '".get_option("external_links_in_new_windows_ignore")."';

        for (var t=0; t<document.links.length; t++) {
            var all_links = document.links[t];
            change_link = false;

            if(document.links[t].hasAttribute('onClick') == false) {
                // forced if the address starts with http (or also https), but does not link to the current domain
                if(all_links.href.search(/^http/) != -1 && all_links.href.search('".$blogdomain['host']."') == -1) {
                    // alert('Changeda '+all_links.href);
                    change_link = true;
                }

                if(force != '' && all_links.href.search(force) != -1) {
                    // forced
                    // alert('force '+all_links.href);
                    change_link = true;
                }

                if(ignore != '' && all_links.href.search(ignore) != -1) {
                    // alert('ignore '+all_links.href);
                    // ignored
                    change_link = false;
                }

                if(change_link == true) {
                    // alert('Changed '+all_links.href);
                    document.links[t].setAttribute('onClick', 'javascript:window.open(\\''+all_links.href+'\\'); return false;');
                    document.links[t].removeAttribute('target');
                }
            }
        }
    }

    // Load
    function external_links_in_new_windows_load(func)
    {
        var oldonload = window.onload;
        if (typeof window.onload != 'function'){
            window.onload = func;
        } else {
            window.onload = function(){
                oldonload();
                func();
            }
        }
    }

    external_links_in_new_windows_load(external_links_in_new_windows_loop);
    ";

  echo "//]]></script>\n\n";
}