最近看了一下關於js日期的一些函數，突然想到了日曆控件，於是試著寫了一個，作為後台程序員的我水平有限，大家抱著學習的態度看看我寫的這個例子吧，一起學習進步！
首先一個常用的日期函數：
Date(year,month,day)
var date=new Date();
獲取年份
var year=this.date.getFullYear();
獲取月份，這裡是月索引所以要+1
var month=this.date.getMonth()+1;
獲取當天是幾號
var day=this.date.getDate();
獲取當天是周幾，返回0.週日1.週一2.週二3.週三4.週四5.週五6.週六
var week=this.date.getDay();
獲取當月一號是周幾
var getWeekDay=function(year,month,day){ var date=new Date(year,month,day); return date.getDay(); } var weekstart= getWeekDay(this.year, this.month-1, 1)獲取當月的天數
var getMonthDays=function(year,month){ var date=new Date(year,month,0); return date.getDate(); }var monthdays= this.getMonthDays(this.year,this.month);好了，我們用到的參數就這麼多，後面其實就是關於日期對應週幾的一些操作和判斷，動態的拼接標籤，下面就直接把我寫的例子發出來：
效果圖：
<html> <meta http-equiv="content-type" content="text/html;charset=utf-8"><head> <style type="text/css">td{ text-align: center;} </style> <script type="text/javascript"> window.onload=function(){ var Calender=function(){ this.Init.apply(this,arguments); } Calender.prototype={ Init:function(container,options){ this.date=new Date(); this.year=this.date.getFullYear(); this.month=this.date.getMonth()+1; this.day=this.date.getDate(); this.week=this.date.getDay(); this.weekstart=this.getWeekDay(this.year, this.month-1, 1); this.monthdays= this.getMonthDays(this.year,this.month); this.containerDiv=document.getElementById(container); this.options=options!=null?options:{ border:'1px solid green', width:'400px', height:'200px', backgroundColor:'lightgrey', fontColor:'blue' } }, getMonthDays:function(year,month){ var date=new Date(year,month,0); return date.getDate(); }, getWeekDay:function(year,month,day){ var date=new Date(year,month,day); return date.getDay(); }, View:function(){ var tablestr='<table>'; tablestr+='<tr><td colspan="3"></td><td>年:'+this.year+'</td><td colspan="3">月：'+this.month+'</td></tr>'; tablestr+='<tr><td>日</td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td></tr>'; var index=1; //判斷每月的第一天在哪個位置var style=''; if(this.weekstart<7) { tablestr+='<tr>'; for (var i = 0; i <this.weekstart; i++) { tablestr+='<td></td>'; }; for (var i = 0; i < 7-this.weekstart; i++) { style=this.day==(i+1)?"background-Color:green;":""; index++; tablestr+='<td style="'+style+'" val='+(this.year+'-'+this.month+'-'+(i+1))+'>'+(i+1)+'</td>'; }; tablestr+='</tr>'; } ///剩余天數對應的位置//判斷整數行並且對應相應的位置var remaindays=this.monthdays-(7-this.weekstart); var row=Math.floor(remaindays%7==0?remaindays/7:((remaindays/7)+1)) ; var count=Math.floor(remaindays/7); for (var i = 0; i < count; i++) { tablestr+='<tr>'; for (var k = 0; k < 7; k++) { style=this.day==(index+k)?"background-Color:green;":""; tablestr+='<td style="'+style+'" val='+(this.year+'-'+this.month+'-'+(index+k))+'>'; tablestr+=index+k; tablestr+='</td>'; }; tablestr+='</tr>'; index+=7; }; //最後剩餘的天數對應的位置(不能填充一周的那幾天) var remaincols=this.monthdays-(index-1); tablestr+='<tr>'; for (var i = 0; i < remaincols; i++) { style=this.day==index?"background-Color:green;":""; tablestr+='<td style="'+style+'" val='+(this.year+'-'+this.month+'-'+(index))+'>'; tablestr+=index; tablestr+='</td>'; index++; }; tablestr+='</tr>'; tablestr+='</table>'; return tablestr; }, Render:function(){ var calenderDiv=document.createElement('div'); calenderDiv.style.border=this.options.border; calenderDiv.style.width=this.options.width; calenderDiv.style.height=this.options.height; calenderDiv.style.cursor='pointer'; calenderDiv.style.backgroundColor=this.options.backgroundColor; // calenderDiv.style.color=this.options.fontColor; calenderDiv.style.color='red' ; calenderDiv.onclick=function(e){ var evt=e||window.event; var target=evt.srcElement||evt.target; if(target&&target.getAttribute('val')) { alert(target.getAttribute('val')); } } var tablestr=this.View(); this.tablestr=tablestr; calenderDiv.innerHTML=tablestr; var div=document.createElement('div'); div.style.width='auto'; div.style.height='auto'; div.appendChild(calenderDiv); ///翻頁div var pagerDiv=document.createElement('div'); pagerDiv.style.width='auto'; pagerDiv.style.height='auto'; var that=this; ///重新設置參數var resetPara=function(year,month,day){ that.date=new Date(year,month,day); that.year=that.date.getFullYear(); that.month=that.date.getMonth()+1; that.day=that.date.getDate(); that.week=that.date.getDay(); that.weekstart=that.getWeekDay(that.year, that.month-1, 1); that.monthdays= that.getMonthDays(that.year,that.month); } //上一頁var preBtn=document.createElement('input'); preBtn.type='button'; preBtn.value='<'; preBtn.onclick=function(){ that.containerDiv.removeChild(div); resetPara(that.year,that.month-2,that.day); that.Render(); } //下一頁var nextBtn=document.createElement('input'); nextBtn.type='button'; nextBtn.value='>'; nextBtn.onclick=function(){ that.containerDiv.removeChild(div); resetPara(that.year,that.month,that.day); that.Render(); } pagerDiv.appendChild(preBtn); pagerDiv.appendChild(nextBtn); div.appendChild(pagerDiv); var dropDiv=document.createElement('div'); var dropdivstr=''; //選擇年份dropdivstr+='<select id="ddlYear">'; for (var i = 1900; i <= 2100; i++) { dropdivstr+= i==that.year ?'<option value="'+i+'" selected="true">'+i+'</option>' : '<option value="'+i+'">'+i+'</option>'; }; dropdivstr+='</select>'; //選擇月份dropdivstr+='<select id="ddlMonth">'; for (var i = 1; i <= 12; i++) { dropdivstr+= i==that.month ?'<option value="'+i+'" selected="true">'+i+'</option>' : '<option value="'+i+'">'+i+'</option>'; }; dropdivstr+='</select>'; dropDiv.innerHTML=dropdivstr; div.appendChild(dropDiv); that.containerDiv.appendChild(div); ///綁定選擇年份和月份的事件var ddlChange=function(){ var ddlYear=document.getElementById('ddlYear'); var ddlMonth=document.getElementById('ddlMonth'); var yearIndex=ddlYear.selectedIndex; var year=ddlYear.options[yearIndex].value; var monthIndex=ddlMonth.selectedIndex; var month=ddlMonth.options[monthIndex].value; that.containerDiv.removeChild(div); resetPara(year,month-1,that.day); that.Render(); } ddlYear.onchange=function(){ ddlChange(); } ddlMonth.onchange=function(){ ddlChange(); } } } var calender=new Calender('dvTest',{ border:'1px solid green', width:'400px', height:'200px', backgroundColor:'' } ); calender.Render(); } </script> </head><body> <div id="dvTest"></div></body></html>代碼重新做了改動，將視圖的table換為了div,是為了解決IE的tableinnerHTML的只讀問題。另外加了options是為了可配置性。
上面代碼有簡單說明，功能是最基礎的，如果更深入的做可以進行擴展，希望這篇文章可以給大家一些啟發。