JS实现以日历形式显示当前时间

效果图：

 <script language="Javascript">
 var datelocalweek=new Array("星期日", "星期一", "星期二","星期三","星期四", "星期五","星期六");
 var datelocalnow=new Date();
 var datelocalyear=datelocalnow.getFullYear();
 var datelocalmonth=(datelocalmonth="0"+(datelocalnow.getMonth()+1)).substr(datelocalmonth.length-2,2);
 var datelocalday=(datelocalday="0"+datelocalnow.getDate()).substr(datelocalday.length-2,2);
 var datelocalweekday=datelocalweek[datelocalnow.getDay()];
 document.write(datelocalyear+"年"+datelocalmonth+"月"+datelocalday+"日"+" "+datelocalweekday);
 </script> 

 //创建一个数组,用于存放每个月的天数
 function montharr(m0, m1, m2, m3, m4, m5, m6, m7, m8, m9, m10, m11) {
 this[0] = m0;
 this[1] = m1;
 this[2] = m2;
 this[3] = m3;
 this[4] = m4;
 this[5] = m5;
 this[6] = m6;
 this[7] = m7;
 this[8] = m8;
 this[9] = m9;
 this[10] = m10;
 this[11] = m11;
 }
 //实现月历
 function calendar() {
 var monthNames = "JanFebMarAprMayJunJulAugSepOctNovDec";
 var today = new Date();
 var thisDay;
 var monthDays = new montharr(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
 year = today.getYear() +1900;
 thisDay = today.getDate();
 if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0))
 monthDays[1] = 29;
 nDays = monthDays[today.getMonth()];
 firstDay = today;
 firstDay.setDate(1);
 testMe = firstDay.getDate();
 if (testMe == 2)
 firstDay.setDate(0);
 startDay = firstDay.getDay();
 var dayNames = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
 var monthNames = 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");
 var now = new Date();
 document.write("<div id='rili' style='position:absolute;width:140px;left:200px;top:50px;'>")
 document.write("<TABLE width='217' BORDER='0' CELLSPACING='0' CELLPADDING='2' BGCOLOR='#0080FF'>")
 document.write("<TR>");
 document.write(" <TD> ");
 document.write(" <table border='0' cellspacing='1' cellpadding='2' bgcolor='Silver'>");
 document.write(" <TR><th colspan='7' bgcolor='#C8E3FF'>");
 document.writeln(" <FONT STYLE='font-size:9pt;Color:#330099'>" + "公元 " + now.getYear() + "年" + monthNames[now.getMonth()] + " " + now.getDate() + "日 " + dayNames[now.getDay()] + "</FONT>");
 document.writeln(" </TH></TR><TR><TH BGCOLOR='#0080FF'><FONT STYLE='font-size:9pt;Color:White'>日</FONT></TH>");
 document.writeln(" <th bgcolor='#0080FF'><FONT STYLE='font-size:9pt;Color:White'>一</FONT></TH>");
 document.writeln(" <TH BGCOLOR='#0080FF'><FONT STYLE='font-size:9pt;Color:White'>二</FONT></TH>");
 document.writeln(" <TH BGCOLOR='#0080FF'><FONT STYLE='font-size:9pt;Color:White'>三</FONT></TH>");
 document.writeln(" <TH BGCOLOR='#0080FF'><FONT STYLE='font-size:9pt;Color:White'>四</FONT></TH>");
 document.writeln(" <TH BGCOLOR='#0080FF'><FONT STYLE='font-size:9pt;Color:White'>五</FONT></TH>");
 document.writeln(" <TH BGCOLOR='#0080FF'><FONT STYLE='font-size:9pt;Color:White'>六</FONT></TH>");
 document.writeln(" </TR><TR>");
 column = 0;
 for (i=0; i<startDay; i++) {
 document.writeln("\n<TD><FONT STYLE='font-size:9pt'> </FONT></TD>");
 column++;
 } 

 for (i=1; i<=nDays; i++) {
 if (i == thisDay) {
 document.writeln("</TD><TD ALIGN='CENTER' BGCOLOR='#FF8040'><FONT STYLE='font-size:9pt;Color:#ffffff'><B>")
 }
 else {
 document.writeln("</TD><TD BGCOLOR='#FFFFFF' ALIGN='CENTER'><FONT STYLE='font-size:9pt;font-family:Arial;font-weight:bold;Color:#330066'>");
 }
 document.writeln(i);
 if (i == thisDay)
 document.writeln("</FONT></TD>")
 column++;
 if (column == 7) {
 document.writeln("<TR>");
 column = 0;
 }
 }
 document.writeln("<TR><TD COLSPAN='7' ALIGN='CENTER' VALIGN='TOP' BGCOLOR='#0080FF'>")
 document.writeln("<FORM NAME='clock' onSubmit='0'><FONT STYLE='font-size:9pt;Color:#ffffff'>")
 document.writeln("现在时间:<INPUT TYPE='Text' NAME='face' ALIGN='TOP'></FONT></FORM></TD></TR></TABLE>")
 document.writeln("</TD></TR></TABLE></div>");
 } 

 var timerID = null;
 var timerRunning = false; 

 function stopclock (){
 if(timerRunning)
 clearTimeout(timerID);
 timerRunning = false;
 } 

 //显示当前时间
 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) ? " 下午 " : " 上午 "
 document.clock.face.value = timeValue;
 timerID = setTimeout("showtime()",1000);//设置超时,使时间动态显示
 timerRunning = true;
 } 

 function startclock () {
 stopclock();
 showtime();
 } 

Show Time

 <html>
 <script language="JavaScript" type="text/javascript" src="time.js"> </script>
 <body bgcolor="#FFFFFF" onLoad="startclock(); timerONE=window.setTimeout" text="#000000">
 <script language="JavaScript" type="text/javascript">
 calendar();
 </script>
 </body>
 </html>