... cosa di questo tipo ?
codice:<html> <head> <title>Prova</title> <script language="JavaScript"> var ref=document.getElementById('mydiv'); var b=true; function MyBlink() { var ref=document.getElementById('mydiv'); if (b) ref.className="c2"; else ref.className="c1"; b=!b; window.setTimeout("MyBlink()",1000); } </script> <style type="text/css"> .c1 { color:blue; } .c2 { color:red; } </style> </head> <body onLoad="MyBlink();"> <div class="c1" id="mydiv">Testo</div> </body> </html>