JS获取当前周、上一周、下一周日期_js 时间两周-优快云博客

本文介绍了一个简单的HTML日历插件实现方案，通过JavaScript动态生成并显示当前周的日历，支持向上和向下切换到前一周和后一周的功能。

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完整html代码如下：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html >
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>日历操作</title>
    <script>
        window.onload = function(){         
            var cells = document.getElementById('monitor').getElementsByTagName('td');
            var clen = cells.length;
            var currentFirstDate;
            var formatDate = function(date){             
                var year = date.getFullYear()+'年';
                var month = (date.getMonth()+1)+'月';
                var day = date.getDate()+'日';
                var week = '('+['星期天','星期一','星期二','星期三','星期四','星期五','星期六'][date.getDay()]+')';  

                return year+month+day+' '+week;
            };
            var addDate= function(date,n){       
                date.setDate(date.getDate()+n);        
                return date;
            };
            var setDate = function(date){             
                var week = date.getDay()-1;
                date = addDate(date,week*-1);
                currentFirstDate = new Date(date);

                for(var i = 0;i<clen;i++){                 
                    cells[i].innerHTML = formatDate(i==0 ? date : addDate(date,1));
                }                
            };             
            document.getElementById('last-week').onclick = function(){
                setDate(addDate(currentFirstDate,-7));         
            };             
            document.getElementById('next-week').onclick = function(){                 
                setDate(addDate(currentFirstDate,7));
            };     
            setDate(new Date());
        }
    </script>
</head>
<body>
    <button id="last-week">上一周</button><button id="next-week">下一周</button>
    <table id="monitor">
        <tr>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
        </tr>
    </table>
</body>
</html>