常用javascript对象——Date对象

创建 Date 对象的语法：

new Date();

1：Date 对象属性

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <script>
        //Date.prototype.方法名=function（）{}为类添加方法
            Date.prototype.currentTime=function (){
                var year = this.getFullYear();
                var month = this.getMonth()+1;
                month=month>10?month:"0"+month;
                var dat =this.getDate();
                dat=dat>10?dat:"0"+dat;
                var week = this.getDay();
                week="星期"+"日一二三四五六".charAt(week);
                
                var hour = this.getHours();
                hour=hour>10?hour:"0"+hour;
                var minute = this.getMinutes();
                minute=minute>10?minute:"0"+minute;
                var second = this.getSeconds();
                second=second>10?second:"0"+second;
                return year+"/"+month+"/"+dat+"/"+week+"  "+hour+":"+minute+":"+second;
            }
            function setTime(){
                document.getElementById("time").innerHTML=new Date().currentTime();
            }
            window.onload=function(){
                setTime();
            };
            setInterval("setTime()",1000);
    </script>
    </head>
    <body>
        <span id="time"></span>
    </body>
    
</html>

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常用javascript对象——Date对象

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