效果图:
看代码:
- <html>
- <head>
- <title>动态日历</title>
- <style type="text/css">
- table{border:1px solid white;}
- thead tr{}
- thead tr td{text-align:center;}
- #calendar tr td{color: #000000;text-decoration: none;text-align:center;}
- </style>
- </head>
- <body>
- 年份:<select id="selYear" name="year" onchange="changeCalendar()"></select>
- 月份:<select id="selMonth" name="month" onchange="changeCalendar()"></select>
- <table width="100%" border="1" cellspacing="0" cellpadding="1">
- <thead>
- <tr>
- <td>Sunday</td>
- <td>Monday</td>
- <td>Tuesday</td>
- <td>Wednesday</td>
- <td>Thursday</td>
- <td>Friday</td>
- <td>Saturday</td>
- </tr>
- </thead>
- <tbody id="calendar"></tbody>
- </table>
- </body>
- <script type="text/javascript">
- (function(){
- var selYear = document.getElementById("selYear");
- var selMonth = document.getElementById("selMonth");
- var date = new Date();
- var year = date.getFullYear();
- var month = date.getMonth() + 1;
- var day = date.getDate();
- //生成当前年往前推10往后推5的数据
- for(var i = year - 10,len = year + 5; i < len; i++){
- var opt = new Option(i + "年", i);
- if(i == year) opt.selected = true;
- selYear.options.add(opt);
- }
- //生成月份数据
- for(var j = 1; j <= 12; j++){
- var m = j < 10 ? "0" + j : j;
- var opt = new Option(m + "月", m);
- if(j == month) opt.selected = true;
- selMonth.options.add(opt);
- }
- //显示当前月日历
- showCalendar(year, month);
- })();
- //得到每月的天数
- function getDaysOfMonth(year, month){
- if(year && month){
- if(month == 2){
- //2月闰年判断
- if((year % 4 == 0 && year % 100 !=0) || year % 400 == 0){
- return 29;
- }
- return 28;
- }
- var bigMonth = [1,3,5,7,8,10,12];
- var littleMonth = [4,6,9,11];
- for(var m in bigMonth){
- if(bigMonth[m] == month)
- return 31;
- }
- for(var m in littleMonth) {
- if(littleMonth[m] == month)
- return 30;
- }
- }
- }
- //根据年月生成日历
- function showCalendar(year, month){
- if(year && month){
- var tbody = document.getElementById("calendar");
- //生成前删除之前的行
- for(var i = 0,len =tbody.rows.length;i< len;i++){
- tbody.deleteRow();
- }
- var date = new Date(year, month - 1, 1);//month月的第一天
- var day = date.getDay();//星期
- var days = getDaysOfMonth(year, month);//month月的总天数
- var temp = Math.floor((days + day) / 7);
- var rows = (days + day) % 7 == 0 ? temp : (temp + 1);//要循环的行数
- var d = 1;
- for(var i = 1; i <= rows; i++){//循环行
- var tr = document.createElement("tr");
- for(var j = 1; j <= 7; j++){//循环列
- var td = document.createElement("td");
- //超过最大天数赋空
- if(d > days){
- td.innerHTML = "";
- tr.appendChild(td);
- continue;
- }
- if(i == 1){
- //第一行判断month月第一天是星期几,例如星期二前面空两个周日、周一
- if(j >= day + 1){
- var html = "<input type='checkbox' name='chkDay'>";
- td.innerHTML = html + (d < 10 ? "0" + d : d);
- d++;
- }else{
- td.innerHTML = "";
- }
- } else {
- var html = "<input type='checkbox' name='chkDay'>";
- td.innerHTML = html + (d < 10 ? "0" + d : d);
- d++;
- }
- tr.appendChild(td);
- }
- tbody.appendChild(tr);
- }
- }
- }
- function changeCalendar(){
- var y = document.getElementById("selYear").value;
- var m = document.getElementById("selMonth").value;
- showCalendar(y, m);
- }
- </script>
- </html>