<body>
<form method="post">
ポッポポポポポ</span><input name="watch" size="8">時だよ〜♪</span>
</form>
<script language="JavaScript">
<!--
function watch() {
setTimeout('watch()', 1000); // 1000msec = 1sec
now = new Date();
hour = now.getHours();
min = now.getMinutes();
sec = now.getSeconds();
document.forms[0].elements[0].value = hour+":"+min+":"+sec;
}
watch();
//-->
</script>