document.write(new Date().getTime());
3.设置年月日（年为必选，月日为可选）：
var d = new Date(); d.setFullYear(2016,3,16) document.write(d); document.write("<br/>"); document.write(d.getTime());
4.返回当前星期几：
document.write(new Date().getDay())
5.日期对象的比较：
function compareDate(){ var oneday = new Date(); oneday.setFullYear(2016,2,26); var currentday = new Date(); if (oneday<currentday){ alert("before"); }else{ alert("after"); } }
效果图：
示例代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="Content-Language" content="zh-cn" /> <title>Javascript 日期对象</title> <head> <style> body {background-color:#e6e6e6} </style> </head> <body> <h3>（一）返回当前的日期</h3> <script> document.write("Current time: "+new Date()); </script> <h3>（二）返回时间戳（毫秒）</h3> <script> document.write(new Date().getTime()); </script> <h3>（三）设置年月日</h3> <script> var d = new Date(); d.setFullYear(2016,3,16) document.write(d); document.write("<br/>"); document.write(d.getTime()); </script> <h3>（四）将当日的日期（根据 UTC）转换为字符串</h3> <script> var d2 = new Date() document.write (d2.toUTCString()) </script> <h3>（五）返回当前星期几</h3> <script> var d3=new Date() var weekday=new Array(7) weekday[0]="星期日" weekday[1]="星期一" weekday[2]="星期二" weekday[3]="星期三" weekday[4]="星期四" weekday[5]="星期五" weekday[6]="星期六" document.write(weekday[d3.getDay()]) </script> <h3>（六）显示一个时间钟表</h3> <p id = "time_text"></p> <script> function startTime(){ var today = new Date(); var y = today.getFullYear(); var M = today.getMonth()+1; var day = today.getDay(); var h = today.getHours(); var m = today.getMinutes(); var s = today.getSeconds(); m = checkTime(m); s = checkTime(s); var content = (y+"https://www.jb51.net/"+M+"https://www.jb51.net/"+day+" "+h+":"+m+":"+s).fontsize(6).fontcolor("red"); document.getElementById("time_text").innerHTML = content; setTimeout("startTime()",500); } function checkTime(i){ if(i<10){ return "0"+i; } return i; } </script> <h3>（七）日期对象的比较</h3> <p>2016.3.26与当前时间的关系？</p> <button onclick = "compareDate()">比较</button> <script> function compareDate(){ var oneday = new Date(); oneday.setFullYear(2016,2,26); var currentday = new Date(); if (oneday<currentday){ alert("before"); }else{ alert("after"); } } </script> </body> </html>
PS：这里再为大家推荐几款时间及日期相关工具供大家参考使用：
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《JavaScript时间与日期操作技巧总结》《JavaScript错误与调试技巧总结》、《JavaScript数据结构与算法技巧总结》、《JavaScript遍历算法与技巧总结》及《JavaScript数学运算用法总结》