在网页的标题栏上显示当前时间，自动走时
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<title>分享JavaScript-sharejs.com</title>
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<SCRIPT language=JavaScript>
var clocktext, timeday;
var pagetitle = document.title;
function scroll() {
today = new Date();
sec = today.getSeconds();
hr = today.getHours();
min = today.getMinutes();
if (hr < 12) { timeday = " AM"; }
else { timeday = " PM"; }
if (hr > 12) hr = hr - 12;
if (hr <= 9) hr = "0" + hr;
if (min <= 9) min = "0" + min;
if (sec <= 9) sec = "0" + sec;
var clocktext = hr + ":" + min + ":" + sec + timeday;
clocktimer = setTimeout("scroll()", 1000);
document.title = pagetitle +" 现在时间"+ clocktext;
}
if (document.all) scroll();
</SCRIPT>
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