<HTML> <HEAD> <TITLE></TITLE> <script type="text/javascript"> function controle() {var er=""; if ( frm.t1.value.length==0 ) er+="\r\nT1 non renseigné"; if ( frm.t2.value.length==0 ) er+="\r\nT2 non renseigné"; if ( frm.t3.value.length==0 ) er+="\r\nT3 non renseigné"; if ( er.length > 0 ) { alert ( er ); return false; } else { return true; } } </script> </HEAD> <form name="frm" action="programme" method="post" onsubmit="return (controle());"> </form> </HTML>