<script type="text/javascript">     
      $('#mchatMsgF').keyup(function(){     
      var url = ["http://", "https://", "www", ".ru", ".su", ".com", ".lv", "www", ".net"];     
      var field = $(this).val();     
      for (i=0; i<url.length; i++){     
      if(field.toLowerCase().indexOf(url[i],'ig')!=-1)     
      if(field.search(document.location.host)==-1) {     
      _uWnd.alert('Linku ievietošana čatā ir aizliekta!','',{w:180,h:38,tm:3000});     
      $(this).val(field.replace(url[i],''));     
      }     
      }     
      });     
      </script>