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计时器<!DOCTYPE html><head> <meta charset="UTF-8"> <title></title> <style>#clock{width:410px;border:5px solid #F00;padding:15px 10px;background:#0F0;margin:auto;text-align: center;}</style> </head> <body> <script>function sysTime(){ var now=new Date(); var year=now.getFullYear(); var month=now.getMonth()+1; var day =now.getDay(); var date=now.getDate(); var hour=now.getHours(); var minute=now.getMinutes(); var second=now.getSeconds(); var week_Array=new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六"); var week=week_Array[day]; if(minute<10){ minute="0"+minute; } if(second<10){ second="0"+second; } var time =year+"年"+month+"月"+date+"日"+" "+hour+"时"+minute+"分"+second+"秒"+" "+week; document.getElementById("clock").innerHTML="当前系统时间："+time;}window.onload=function(){ window.setInterval("sysTime()",1000);}</script><div id="clock"></div> </body></html>