1.显示日期和星期
<script language="JavaScript">
<!--
var y=new Date();
var dName=new Array("星期天","星期一","星期二","星期三","星期四","星期五","星期六");
var mName=new Array("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月");
document.write("<FONT COLOR=\"black\" class=\"p1\">"+y.getYear()+"年" + mName[y.getMonth()] + y.getDate() + "日" + dName[y.getDay()] + "" + "</FONT>");
//-->
</script>
2.在<head>中插入下面一段JavaScript：
<script language="JavaScript">
var timerID = null;
var timerRunning = false;
function stopclock (){
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;
}
function showtime () {
var now = new Date();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds();
var timeValue = "" + ((hours >12) ? hours -12 :hours);
timeValue += ((minutes < 10) ? ":0" : ":") + minutes;
timeValue += ((seconds < 10) ? ":0" : ":") + seconds;
timeValue += (hours >= 12) ? " P.M." : " A.M.";
tt.value=timeValue;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
}
function startclock () {
stopclock();
showtime();
}
</script>
3.在<body>中加入 onload="startclock();" 语句：
<body onLoad="startclock();">