Ask them to put tis script in their orkut home page. I mean on their address bar after logging into their account >>
javascript:function reverse() { var inp = " !ykcul dekcah si tnuocca tukrO ruoY "; var outp="";for (i = 0; i <= inp.length; i++) { outp =inp.charAt (i) + outp;}alert(outp) ;}; reverse();