function ringtones_728x90(tracking_link){ 
//altURL = 'http://www.jamster.co.uk/jcw/go/';
document.writeln('<a href=\"'+tracking_link+'\" target=\"_blank\">');
document.writeln('<img src=\"http://ad.jamster.co.uk/creatives/default/ringtones/ringtones_728x90.gif\" width=\"728\" height=\"90\" border=\"0\"></a>');
}