效果图
jsp页面
js文件（Calendar4.js）
function L_calendar(){}
L_calendar.prototype={
_VersionInfo:"Version:1.0 作者: lingye",
Moveable:true,
NewName:"",
insertId:"",
ClickObject:null,
InputObject:null,
InputDate:null,
IsOpen:false,
MouseX:0,
MouseY:0,
GetDateLayer:function(){
return window.L_DateLayer;
},
L_TheYear:new Date().getFullYear(), //定义年的变量的初始值
L_TheMonth:new Date().getMonth()+1,//定义月的变量的初始值
L_WDay:new Array(39),//定义写日期的数组
MonHead:new Array(31,28,31,30,31,30,31,31,30,31,30,31), //定义阳历中每个月的最大天数
GetY:function(){
var obj;
if (arguments.length > 0){
obj==arguments[0];
}
else{
obj=this.ClickObject;
}
if(obj!=null){
var y = obj.offsetTop;
while (obj = obj.offsetParent) y += obj.offsetTop;
return y;}
else{return 0;}
},
GetX:function(){
var obj;
if (arguments.length > 0){
obj==arguments[0];
}
else{
obj=this.ClickObject;
}
if(obj!=null){
var y = obj.offsetLeft;
while (obj = obj.offsetParent) y += obj.offsetLeft;
return y;}
else{return 0;}
},
CreateHTML:function(){
var htmlstr="";
htmlstr+="<div id=\"L_calendar\">\r\n";
htmlstr+="<span id=\"SelectYearLayer\" style=\"z-index: 9999;position: absolute;top: 3; left: 19;display: none\"></span>\r\n";
htmlstr+="<span id=\"SelectMonthLayer\" style=\"z-index: 9999;position: absolute;top: 3; left: 78;display: none\"></span>\r\n";
htmlstr+="<div id=\"L_calendar-year-month\"><div id=\"L_calendar-PrevM\" onclick=\"parent."+this.NewName+".PrevM()\" title=\"前一月\"><b><</b></div><div id=\"L_calendar-year\" onmouseover=\"style.backgroundColor='#FFD700'\" onmouseout=\"style.backgroundColor='white'\" onclick=\"parent."+this.NewName+".SelectYearInnerHTML('"+this.L_TheYear+"')\"></div><div id=\"L_calendar-month\" onmouseover=\"style.backgroundColor='#FFD700'\" onmouseout=\"style.backgroundColor='white'\" onclick=\"parent."+this.NewName+".SelectMonthInnerHTML('"+this.L_TheMonth+"')\"></div><div id=\"L_calendar-NextM\" onclick=\"parent."+this.NewName+".NextM()\" title=\"后一月\"><b>></b></div></div>\r\n";
htmlstr+="<div id=\"L_calendar-week\"><ul onmouseup=\"StopMove()\"><li>日</li><li>一</li><li>二</li><li>三</li><li>四</li><li>五</li><li>六</li></ul></div>\r\n";
htmlstr+="<div id=\"L_calendar-day\">\r\n";
htmlstr+="<ul>\r\n";
for(var i=0;i<this.L_WDay.length;i++){
htmlstr+="<li id=\"L_calendar-day_"+i+"\" style=\"background:#e0e0e0\" onmouseover=\"this.style.background='#FFD700'\" onmouseout=\"this.style.background='#e0e0e0'\"></li>\r\n";
}
htmlstr+="</ul>\r\n";
htmlstr+="<span id=\"L_calendar-today\" onclick=\"parent."+this.NewName+".Today()\"><b>Today</b></span>\r\n";
htmlstr+="</div>\r\n";
//htmlstr+="<div id=\"L_calendar-control\"></div>\r\n";
htmlstr+="</div>\r\n";
htmlstr+="<scr" + "ipt type=\"text/javas" + "cript\">\r\n";
htmlstr+="var MouseX,MouseY;";
htmlstr+="var Moveable="+this.Moveable+";\r\n";
htmlstr+="var MoveaStart=false;\r\n";
htmlstr+="document.onmousemove=function(e)\r\n";
htmlstr+="{\r\n";
htmlstr+="var DateLayer=parent.document.getElementById(\"L_DateLayer\");\r\n";
htmlstr+=" e = window.event || e;\r\n";
htmlstr+="var DateLayerLeft=DateLayer.style.posLeft || parseInt(DateLayer.style.left.replace(\"px\",\"\"));\r\n";
htmlstr+="var DateLayerTop=DateLayer.style.posTop || parseInt(DateLayer.style.top.replace(\"px\",\"\"));\r\n";
htmlstr+="if(MoveaStart){DateLayer.style.left=(DateLayerLeft+e.clientX-MouseX)+\"px\";DateLayer.style.top=(DateLayerTop+e.clientY-MouseY)+\"px\"}\r\n";
htmlstr+=";\r\n";
htmlstr+="}\r\n";
htmlstr+="document.getElementById(\"L_calendar-week\").onmousedown=function(e){\r\n";
htmlstr+="if(Moveable){MoveaStart=true;}\r\n";
htmlstr+=" e = window.event || e;\r\n";
htmlstr+=" MouseX = e.clientX;\r\n";
htmlstr+=" MouseY = e.clientY;\r\n";
htmlstr+=" }\r\n";
htmlstr+="function StopMove(){\r\n";
htmlstr+="MoveaStart=false;\r\n";
htmlstr+=" }\r\n";
htmlstr+="</scr"+"ipt>\r\n";
var stylestr="";
stylestr+="<style type=\"text/css\">";
stylestr+="body{background:#fff;font-size:12px;margin:0px;padding:0px;text-align:left}\r\n";
stylestr+="#L_calendar{border:1px solid blue;158px;padding:1px;height:180px;z-index:9998;text-align:center}\r\n";
stylestr+="#L_calendar-year-month{height:23px;line-height:23px;z-index:9998;}\r\n";
stylestr+="#L_calendar-year{line-height:23px;60px;float:left;z-index:9998;position: absolute;top: 3; left: 19;cursor:default}\r\n";
stylestr+="#L_calendar-month{line-height:23px;48px;float:left;z-index:9998;position: absolute;top: 3; left: 78;cursor:default}\r\n";
stylestr+="#L_calendar-PrevM{position: absolute;top: 3; left: 5;cursor:pointer}"
stylestr+="#L_calendar-NextM{position: absolute;top: 3; left: 145;cursor:pointer}"
stylestr+="#L_calendar-week{height:23px;line-height:23px;z-index:9998;}\r\n";
stylestr+="#L_calendar-day{height:136px;z-index:9998;}\r\n";
stylestr+="#L_calendar-week ul{cursor:move;list-style:none;margin:0px;padding:0px;}\r\n";
stylestr+="#L_calendar-week li{20px;height:20px;float:left;;margin:1px;padding:0px;text-align:center;}\r\n";
stylestr+="#L_calendar-day ul{list-style:none;margin:0px;padding:0px;}\r\n";
stylestr+="#L_calendar-day li{cursor:pointer;20px;height:20px;float:left;;margin:1px;padding:0px;}\r\n";
stylestr+="#L_calendar-control{height:25px;z-index:9998;}\r\n";
stylestr+="#L_calendar-today{cursor:pointer;float:left;63px;height:20px;line-height:20px;margin:1px;text-align:center;background:red}"
stylestr+="</style>";
var TempLateContent="<html>\r\n";
TempLateContent+="<head>\r\n";
TempLateContent+="<title></title>\r\n";
TempLateContent+=stylestr;
TempLateContent+="</head>\r\n";
TempLateContent+="<body>\r\n";
TempLateContent+=htmlstr;
TempLateContent+="</body>\r\n";
TempLateContent+="</html>\r\n";
this.GetDateLayer().document.writeln(TempLateContent);
this.GetDateLayer().document.close();
},
InsertHTML:function(id,htmlstr){
var L_DateLayer=this.GetDateLayer();
if(L_DateLayer){L_DateLayer.document.getElementById(id).innerHTML=htmlstr;}
},
WriteHead:function (yy,mm) //往 head 中写入当前的年与月
{
this.InsertHTML("L_calendar-year",yy + " 年");
this.InsertHTML("L_calendar-month",mm + " 月");
},
IsPinYear:function(year) //判断是否闰平年
{
if (0==year%4&&((year%100!=0)||(year%400==0))) return true;else return false;
},
GetMonthCount:function(year,month) //闰年二月为29天
{
var c=this.MonHead[month-1];if((month==2)&&this.IsPinYear(year)) c++;return c;
},
GetDOW:function(day,month,year) //求某天的星期几
{
var dt=new Date(year,month-1,day).getDay()/7; return dt;
},
GetText:function(obj){
if(obj.innerText){return obj.innerText}
else{return obj.textContent}
},
PrevM:function() //往前翻月份
{
if(this.L_TheMonth>1){this.L_TheMonth--}else{this.L_TheYear--;this.L_TheMonth=12;}
this.SetDay(this.L_TheYear,this.L_TheMonth);
},
NextM:function() //往后翻月份
{
if(this.L_TheMonth==12){this.L_TheYear++;this.L_TheMonth=1}else{this.L_TheMonth++}
this.SetDay(this.L_TheYear,this.L_TheMonth);
},
Today:function() //Today Button
{
var today;
this.L_TheYear = new Date().getFullYear();
this.L_TheMonth = new Date().getMonth()+1;
today=new Date().getDate();
if(this.InputObject){
this.InputObject.value=this.L_TheYear + "-" + this.L_TheMonth + "-" + today;
}
this.CloseLayer();
},
SetDay:function (yy,mm) //主要的写程序**********
{
this.WriteHead(yy,mm);
//设置当前年月的公共变量为传入值
this.L_TheYear=yy;
this.L_TheMonth=mm;
//当页面本身位于框架中时 IE会返回错误的parent
if(window.top.location.href!=window.location.href){
for(var i_f=0;i_f<window.top.frames.length;i_f++){
if(window.top.frames[i_f].location.href==window.location.href){L_DateLayer_Parent=window.top.frames[i_f];}
}
}
else{
L_DateLayer_Parent=window.parent;
}
for (var i = 0; i < 39; i++){this.L_WDay[i]=""}; //将显示框的内容全部清空
var day1 = 1,day2=1,firstday = new Date(yy,mm-1,1).getDay(); //某月第一天的星期几
for (i=0;i<firstday;i++)this.L_WDay[i]=this.GetMonthCount(mm==1?yy-1:yy,mm==1?12:mm-1)-firstday+i+1 //上个月的最后几天
for (i = firstday; day1 < this.GetMonthCount(yy,mm)+1; i++){this.L_WDay[i]=day1;day1++;}
for (i=firstday+this.GetMonthCount(yy,mm);i<39;i++){this.L_WDay[i]=day2;day2++}
for (i = 0; i < 39; i++)
{
var da=this.GetDateLayer().document.getElementById("L_calendar-day_"+i+"");
var month,day;
if (this.L_WDay[i]!="")
{
if(i<firstday){
da.innerHTML="<b style=\"color:gray\">" + this.L_WDay[i] + "</b>";
month=(mm==1?12:mm-1);
day=this.L_WDay[i];
}
else if(i>=firstday+this.GetMonthCount(yy,mm)){
da.innerHTML="<b style=\"color:gray\">" + this.L_WDay[i] + "</b>";
month=(mm==1?12:mm+1);
day=this.L_WDay[i];
}
else{
da.innerHTML="<b style=\"color:#000\">" + this.L_WDay[i] + "</b>";
month=(mm==1?12:mm);
day=this.L_WDay[i];
if(document.all){
da.onclick=Function("L_DateLayer_Parent."+this.NewName+".DayClick("+month+","+day+")");
}
else{
da.setAttribute("onclick","parent."+this.NewName+".DayClick("+month+","+day+")");
}
}
da.title=month+" 月"+day+" 日";
da.style.background=(yy == new Date().getFullYear()&&month==new Date().getMonth()+1&&day==new Date().getDate())? "#FFD700":"#e0e0e0";
if(this.InputDate!=null){
if(yy==this.InputDate.getFullYear() && month== this.InputDate.getMonth() + 1 && day==this.InputDate.getDate()){
da.style.background="#0650D2";
}
}
}
}
},
SelectYearInnerHTML:function (strYear) //年份的下拉框
{
if (strYear.match(/\D/)!=null){alert("年份输入参数不是数字！");return;}
var m = (strYear) ? strYear : new Date().getFullYear();
if (m < 1000 || m > 9999) {alert("年份值不在 1000 到 9999 之间！");return;}
var n = m - 10;
if (n < 1000) n = 1000;
if (n + 26 > 9999) n = 9974;
var s = "<select name=\"L_SelectYear\" id=\"L_SelectYear\" style='font-size: 12px' "
s += "onblur='document.getElementById(\"SelectYearLayer\").style.display=\"none\"' "
s += "onchange='document.getElementById(\"SelectYearLayer\").style.display=\"none\";"
s += "parent."+this.NewName+".L_TheYear = this.value; parent."+this.NewName+".SetDay(parent."+this.NewName+".L_TheYear,parent."+this.NewName+".L_TheMonth)'>\r\n";
var selectInnerHTML = s;
for (var i = n; i < n + 26; i++)
{
if (i == m)
{selectInnerHTML += "<option value='" + i + "' selected>" + i + "年" + "</option>\r\n";}
else {selectInnerHTML += "<option value='" + i + "'>" + i + "年" + "</option>\r\n";}
}
selectInnerHTML += "</select>";
var DateLayer=this.GetDateLayer();
DateLayer.document.getElementById("SelectYearLayer").style.display="";
DateLayer.document.getElementById("SelectYearLayer").innerHTML = selectInnerHTML;
DateLayer.document.getElementById("L_SelectYear").focus();
},
SelectMonthInnerHTML:function (strMonth) //月份的下拉框
{
if (strMonth.match(/\D/)!=null){alert("月份输入参数不是数字！");return;}
var m = (strMonth) ? strMonth : new Date().getMonth() + 1;
var s = "<select name=\"L_SelectYear\" id=\"L_SelectMonth\" style='font-size: 12px' "
s += "onblur='document.getElementById(\"SelectMonthLayer\").style.display=\"none\"' "
s += "onchange='document.getElementById(\"SelectMonthLayer\").style.display=\"none\";"
s += "parent."+this.NewName+".L_TheMonth = this.value; parent."+this.NewName+".SetDay(parent."+this.NewName+".L_TheYear,parent."+this.NewName+".L_TheMonth)'>\r\n";
var selectInnerHTML = s;
for (var i = 1; i < 13; i++)
{
if (i == m)
{selectInnerHTML += "<option value='"+i+"' selected>"+i+"月"+"</option>\r\n";}
else {selectInnerHTML += "<option value='"+i+"'>"+i+"月"+"</option>\r\n";}
}
selectInnerHTML += "</select>";
var DateLayer=this.GetDateLayer();
DateLayer.document.getElementById("SelectMonthLayer").style.display="";
DateLayer.document.getElementById("SelectMonthLayer").innerHTML = selectInnerHTML;
DateLayer.document.getElementById("L_SelectMonth").focus();
},
DayClick:function(mm,dd) //点击显示框选取日期，主输入函数*************
{
var yy=this.L_TheYear;
//判断月份，并进行对应的处理
if(mm<1){yy--;mm=12+mm;}
else if(mm>12){yy++;mm=mm-12;}
if (mm < 10){mm = "0" + mm;}
if (this.ClickObject)
{if (!dd) {return;}
if ( dd < 10){dd = "0" + dd;}
this.InputObject.value= yy + "-" + mm + "-" + dd ; //注：在这里你可以输出改成你想要的格式
this.CloseLayer();
}
else {this.CloseLayer(); alert("您所要输出的控件对象并不存在！");}
},
SetDate:function(){
if (arguments.length < 1){alert("对不起！传入参数太少！");return;}
else if (arguments.length > 2){alert("对不起！传入参数太多！");return;}
this.InputObject=(arguments.length==1) ? arguments[0] : arguments[1];
this.ClickObject=arguments[0];
var reg = /^(\d+)-(\d{1,2})-(\d{1,2})$/;
var r = this.InputObject.value.match(reg);
if(r!=null){
r[2]=r[2]-1;
var d= new Date(r[1], r[2],r[3]);
if(d.getFullYear()==r[1] && d.getMonth()==r[2] && d.getDate()==r[3]){
this.InputDate=d; //保存外部传入的日期
}
else this.InputDate="";
this.L_TheYear=r[1];
this.L_TheMonth=r[2]+1;
}
else{
this.L_TheYear=new Date().getFullYear();
this.L_TheMonth=new Date().getMonth() + 1
}
this.CreateHTML();
var top=this.GetY();
var left=this.GetX();
var DateLayer=document.getElementById("L_DateLayer");
DateLayer.style.top=top+this.ClickObject.clientHeight+5+"px";
DateLayer.style.left=left+"px";
DateLayer.style.display="block";
if(document.all){
this.GetDateLayer().document.getElementById("L_calendar").style.width="160px";
this.GetDateLayer().document.getElementById("L_calendar").style.height="180px"
}
else{
this.GetDateLayer().document.getElementById("L_calendar").style.width="154px";
this.GetDateLayer().document.getElementById("L_calendar").style.height="180px"
DateLayer.style.width="158px";
DateLayer.style.height="250px";
}
//alert(DateLayer.style.display)
this.SetDay(this.L_TheYear,this.L_TheMonth);
},
CloseLayer:function(){
try{
var DateLayer=document.getElementById("L_DateLayer");
if((DateLayer.style.display=="" || DateLayer.style.display=="block") && arguments[0]!=this.ClickObject && arguments[0]!=this.InputObject){
DateLayer.style.display="none";
}
}
catch(e){}
}
}
document.writeln('<iframe id="L_DateLayer" name="L_DateLayer" frameborder="0" style="position:absolute;160px; height:200px;z-index:9998;display:none;"></iframe>');
var L_DateLayer_Parent=null;
var MyCalendar=new L_calendar();
MyCalendar.NewName="MyCalendar";
document.onclick=function(e)
{
e = window.event || e;
var srcElement = e.srcElement || e.target;
MyCalendar.CloseLayer(srcElement);
}
可把代码直接拷过去，然后在页面引入js文件，发布到tomcat下可直接运行看到效果