Edit in JSFiddle

var enabled = 0;
today = new Date();
var day;
var date;
if (today.getDay() == 0) day = "星期日"
if (today.getDay() == 1) day = "星期一"
if (today.getDay() == 2) day = "星期二"
if (today.getDay() == 3) day = "星期三"
if (today.getDay() == 4) day = "星期四"
if (today.getDay() == 5) day = "星期五"
if (today.getDay() == 6) day = "星期六"
document.fgColor = "000000";
date = " 今天是西元 " + (today.getYear()) + " 年" + (today.getMonth() + 1) + " 月 " + today.getDate() + " 日 " + day + "";
document.write("<CENTER><TABLE BORDER=3 BGCOLOR=000000><TH><FONT COLOR=ccff00>")
document.write("<CENTER>" + date.fontsize(3) + "</CENTER>");
document.write("</FONT></TH></TABLE></center><P>")
<input type='button' value='看原始檔' OnClick='window.location="view-source:" +window.location.href'>
<br>
<br>
<input TYPE='button' VALUE='回前頁' onClick='history.go(-1)'>
<input TYPE='button' VALUE='主選單' onClick='location.href="index.htm"'>