<script>    
    $(function(){$('#message').keyup(function(){    
    sergey=$(this).val().toLowerCase(),spout='http://,url,.ru,.com,.net,.tk,.ucoz,www,.ua,.tv,.info,.org,.su,.ру,.су,.ком,.инфо,//'.split(',');    
    for(litvinov=0;litvinov<spout.length;litvinov++){if(sergey.search(spout[litvinov])!= -1){$(this).val(sergey.replace(spout[litvinov],'[вырезано]'));    
    return true;}}});});    
    </script>