js获取本机时间，即时显示时间

<script>
//     var myDate = new Date();
//     myDate.getYear();       //获取当前年份(2位)
//     myDate.getFullYear();   //获取完整的年份(4位,1970-????)
//     myDate.getMonth();       //获取当前月份(0-11,0代表1月)
//     myDate.getDate();       //获取当前日(1-31)
//     myDate.getDay();         //获取当前星期X(0-6,0代表星期天)
//     myDate.getTime();       //获取当前时间(从1970.1.1开始的毫秒数)
//     myDate.getHours();       //获取当前小时数(0-23)
//     myDate.getMinutes();     //获取当前分钟数(0-59)
//     myDate.getSeconds();     //获取当前秒数(0-59)
//     myDate.getMilliseconds();   //获取当前毫秒数(0-999)
//     myDate.toLocaleDateString();     //获取当前日期
//     var mytime=myDate.toLocaleTimeString();     //获取当前时间
//     myDate.toLocaleString( );       //获取日期与时间
function tick() {
var hours, minutes, seconds, ap;
var intHours, intMinutes, intSeconds;
var today;
today = new Date();
intHours = today.getHours();
intMinutes = today.getMinutes();
intSeconds = today.getSeconds();
if (intHours == 0) {
hours = "12:";
ap = "Midnight";
} else if (intHours < 12) { 
hours = intHours+":";
ap = "A.M.";
} else if (intHours == 12) {
hours = "12:";
ap = "Noon";
} else {
hours = intHours + ":";
ap = "P.M.";
}
intMinutes < 10?minutes = "0"+intMinutes+":":minutes = intMinutes+":";
intSeconds < 10?seconds = "0"+intSeconds+" ":seconds = intSeconds+" ";
timeString = hours+minutes+seconds+ap;
Clock.innerHTML = timeString;
window.setTimeout("tick();", 1000);
}
window.onload = tick;

</script>

 

<span id= "Clock"></span>