js数字时钟——怎么不能用呢？ 因为js代码是从上到下执行的，所以var clock=document.getElementById(\"myclock\")；找不到元素clock是空的所以可以将js代码放到div后面，也可以将 var clock=document.getElementById(\"myclock\")；定义放到 setInterval的function里如：setInterval(function(){var clock=document.getElementById(\"myclock\")；var d=new Date()；clock.innerHTML=d.getHours()+\"：\"+d.getMinutes()+\"：\"+d.getSeconds()；}，1000)；00：00：00
vue.js带有星期日期的数字时钟 html，body { height：100%；} body { background：#0f3854；background：-webkit-radial-gradient(center ellipse，#0a2e38 0%，#000000 70%)；background：radial-gradient(ellipse。
用JavaScript编写一个动态实时显示的数字时钟代码。 setinterval。你去了解一下。自己看更好
js数字时钟 <；span id=\"datetime\">；timefunction setTime(){var day=\"；var month=\"；var ampm=\"；var ampmhour=\"；var myweekday=\"；var year=\"；var myHours=\"；var myMinutes=\"；var mySeconds=\"；mydate=new Date()；myweekday=mydate.getDay()；mymonth=parseInt(mydate.getMonth()+1)(mydate.getMonth()+1)：mydate.getMonth()+1；myday=mydate.getDate()；myyear=mydate.getYear()；myHours=mydate.getHours()；myMinutes=mydate.getMinutes()；mySeconds=parseInt(mydate.getSeconds())()：mydate.getSeconds()；year=(myyear>；200)？myyear：1900+myyear；if(myweekday=0)weekday=\"星期日；else if(myweekday=1)weekday=\"星期一；else if(myweekday=2)weekday=\"星期二；else if(myweekday=3)weekday=\"星期三；else if(myweekday=4)weekday=\"星期四；else if(myweekday=5)weekday=\"星期五；else if(myweekday=6)weekday=\"星期六；datetime.innerText=year+\"年\"+mymonth+\"月\"+myday+\"日\"+myHours+\"：\"+myMinutes+\"：\"+mySeconds+\"\"+weekday；setTimeout(\"setTime()\"，1000)；}setTime()；
js数字时钟问题
