1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Document</title> 6 <script type="text/javascript"> 7 window.onload = function(){ 8 var oDiv = document.getElementById('div1'); 9 10 11 function fnMyclock(){ 12 var sNow = new Date(); 13 var iYear = sNow.getFullYear(); 14 var iMonth = sNow.getMonth() + 1; // 这里的月是按0到11，所以要加一 15 var iDate = sNow.getDate(); 16 var iWeek = sNow.getDay(); //星期是从0到6，0是表示星期天 17 var iHour = sNow.getHours(); 18 var iMinute = sNow.getMinutes(); 19 var iSecond = sNow.getSeconds(); 20 var sTr = '当前时间：' + iYear +'年' + iMonth + '月' +iDate + '日' + " " + fnToweek(iWeek) + ' ' +fnTodou(iHour) + ":" + fnTodou(iMinute) + ":" + fnTodou(iSecond); 21 // 如果要写星期几和具体时间，需要写函数调节格式 22 oDiv.innerHTML = sTr; 23 } 24 25 fnMyclock(); //先调用一次，解决刚打开浏览器时的1s空白问题，和刷新间断问题 26 var timer = setInterval(fnMyclock,1000); //调用有1s的延时 27 28 29 function fnTodou(n){ 30 if (n<10) { 31 return '0' + n; 32 } 33 else{ 34 return n 35 } 36 } 37 38 39 function fnToweek(iWeek){ 40 switch(iWeek){ 41 case 0: 42 return '星期日'; 43 break; 44 case 1: 45 return '星期一'; 46 break; 47 case 2: 48 return '星期二'; 49 break; 50 case 3: 51 return '星期三'; 52 break; 53 case 4: 54 return '星期四'; 55 break; 56 case 5: 57 return '星期五'; 58 break; 59 default: 60 return '星期六'; 61 } 62 } 63 } 64 </script> 65 <style type="text/css"> 66 div{ 67 background-color: gold; 68 font-size: 20px; 69 height: 300px; 70 width: 1000px; 71 line-height: 300px; 72 margin: 50px auto 0; 73 text-align: center; 74 } 75 </style> 76 </head> 77 <body> 78 <div id="div1"></div> 79 </body> 80 </html>