JS轻松实现单击文本框弹出选择日期

我的开发工具是vs2005,你们可选择自己合适的开发工具

首先创建个文本框
<input id="txFDate" name="txFDate" type="text" value="" onfocus="setday(this)" runat="server" />

可以看到文本框有个onfocus触发事件，现在就贴上这个事件的代码（代码比较长，但是只需要复制所有代码把他写进一个js,然后在调用这个JS即可）：

calendar.js

// 主调用函数是 setday(this,[object])和setday(this)，[object]是控件输出的控件名，举两个例子：
// 一、<input name=txt><input type=button value=setday onclick="setday(this,document.all.txt)">
// 二、<input onfocus="setday(this)">
//function setaa()
//{
//alert('1111');
//}
var bMoveable=true;
var strFrame;

window.frames.endDateLayer.document.writeln(strFrame);
window.frames.endDateLayer.document.close(); //解决ie进度条不结束的问题

//==================================================== WEB 页面显示部分 ======================================================
var outObject;
var outButton; //点击的按钮

var outDate="";   //存放对象的日期
var bUseTime=false;   //是否使用时间
var odatelayer=window.frames.endDateLayer.document.all;   //存放日历对象
var odatelayer=window.endDateLayer.document.all;
//odatelayer.bUseTimeLayer.innerText="NO";
bImgSwitch();
odatelayer.bUseTimeLayer.innerHTML=bImg;

function setday(tt,obj) //主调函数
{

if (arguments.length > 2){alert("对不起！传入本控件的参数太多！");return;}
if (arguments.length == 0){alert("对不起！您没有传回本控件任何参数！");return;}
var dads = document.all.endDateLayer.style;
var th = tt;
var ttop = tt.offsetTop; //TT控件的定位点高

var thei = tt.clientHeight; //TT控件本身的高
var tleft = tt.offsetLeft; //TT控件的定位点宽

var ttyp = tt.type; //TT控件的类型

while (tt = tt.offsetParent){ttop+=tt.offsetTop; tleft+=tt.offsetLeft;}
dads.top = (ttyp=="image") ? ttop+thei : ttop+thei+6;
dads.left = tleft;
outObject = (arguments.length == 1) ? th : obj;
outButton = (arguments.length == 1) ? null : th; //设定外部点击的按钮

//根据当前输入框的日期显示日历的年月
var reg = /^(\d+)-(\d{1,2})-(\d{1,2})/;   //不含时间
var r = outObject.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])
   {
    outDate=d;
    parent.meizzTheYear = r[1];
    parent.meizzTheMonth = r[2];
    parent.meizzTheDate = r[3];
   }
   else
   {
    outDate="";
   }
   meizzSetDay(r[1],r[2]+1);
}
else
{
   outDate="";
   meizzSetDay(new Date().getFullYear(), new Date().getMonth() + 1);
}
dads.display = '';

//判断初始化时是否使用时间,非严格验证
//if (outObject.value.length>10)
//{
   bUseTime=true;
   bImgSwitch();
   odatelayer.bUseTimeLayer.innerHTML=bImg;
   meizzWriteHead(meizzTheYear,meizzTheMonth);
//}
//else
//{
// bUseTime=false;
// bImgSwitch();
// odatelayer.bUseTimeLayer.innerHTML=bImg;
// meizzWriteHead(meizzTheYear,meizzTheMonth);
//}

try
{
event.returnValue=false;
}
catch (e)
{
//此处排除错误，错误原因暂未找到。
}
}

var MonHead = new Array(12); //定义阳历中每个月的最大天数

MonHead[0] = 31; MonHead[1] = 28; MonHead[2] = 31; MonHead[3] = 30; MonHead[4] = 31; MonHead[5] = 30;
MonHead[6] = 31; MonHead[7] = 31; MonHead[8] = 30; MonHead[9] = 31; MonHead[10] = 30; MonHead[11] = 31;

var meizzTheYear=new Date().getFullYear(); //定义年的变量的初始值

var meizzTheMonth=new Date().getMonth()+1; //定义月的变量的初始值

var meizzTheDate=new Date().getDate(); //定义日的变量的初始值
var meizzTheHour=new Date().getHours(); //定义小时变量的初始值

var meizzTheMinute=new Date().getMinutes();//定义分钟变量的初始值
var meizzTheSecond=new Date().getSeconds();//定义秒变量的初始值

var meizzWDay=new Array(37); //定义写日期的数组

function document.onclick() //任意点击时关闭该控件 //ie6的情况可以由下面的切换焦点处理代替
{
with(window.event)
{
if (srcElement != outObject && srcElement != outButton)
closeLayer();
}
}

function document.onkeyup()   //按Esc键关闭，切换焦点关闭
{
if (window.event.keyCode==27){
   if(outObject)outObject.blur();
   closeLayer();
}
else if(document.activeElement)
{
   if(document.activeElement != outObject && document.activeElement != outButton)
   {
    closeLayer();
   }
}
}

function meizzWriteHead(yy,mm,ss) //往 head 中写入当前的年与月
{
odatelayer.meizzYearHead.innerText = yy + " 年";
odatelayer.meizzMonthHead.innerText = format(mm) + " 月";
//插入当前小时、分
odatelayer.meizzHourHead.innerText=bUseTime?(meizzTheHour+" 时"):"";
odatelayer.meizzMinuteHead.innerText=bUseTime?(meizzTheMinute+" 分"):"";
odatelayer.meizzSecondHead.innerText=bUseTime?(meizzTheSecond+" 秒"):"";
}

/***** 增加小时、分钟 ***/
function tmpSelectHourInnerHTML(strHour) //小时的下拉框
{
if (!bUseTime){return;}

if (strHour.match(/\D/)!=null){alert("小时输入参数不是数字！");return;}
var m = (strHour) ? strHour : new Date().getHours();
var s = "<select name=tmpSelectHour style='font-size: 12px' "
s += "onblur='document.all.tmpSelectHourLayer.style.display=\"none\"' "
s += "onchange='document.all.tmpSelectHourLayer.style.display=\"none\";"
s += "parent.meizzTheHour = this.value; parent.evaSetTime(parent.meizzTheHour,parent.meizzTheMinute);'>\r\n";
var selectInnerHTML = s;
for (var i = 0; i < 24; i++)
{
if (i == m) { selectInnerHTML += "<option value='"+i+"' selected>"+i+"</option>\r\n"; }
else { selectInnerHTML += "<option value='"+i+"'>"+i+"</option>\r\n"; }
}
selectInnerHTML += "</select>";
odatelayer.tmpSelectHourLayer.style.display="";
odatelayer.tmpSelectHourLayer.innerHTML = selectInnerHTML;
odatelayer.tmpSelectHour.focus();
}

function tmpSelectMinuteInnerHTML(strMinute) //分钟的下拉框
{
if (!bUseTime){return;}

if (strMinute.match(/\D/)!=null){alert("分钟输入参数不是数字！");return;}
var m = (strMinute) ? strMinute : new Date().getMinutes();
var s = "<select name=tmpSelectMinute style='font-size: 12px' "
s += "onblur='document.all.tmpSelectMinuteLayer.style.display=\"none\"' "
s += "onchange='document.all.tmpSelectMinuteLayer.style.display=\"none\";"
s += "parent.meizzTheMinute = this.value; parent.evaSetTime(parent.meizzTheHour,parent.meizzTheMinute);'>\r\n";
var selectInnerHTML = s;
for (var i = 0; i < 60; i++)
{
if (i == m) { selectInnerHTML += "<option value='"+i+"' selected>"+i+"</option>\r\n"; }
else { selectInnerHTML += "<option value='"+i+"'>"+i+"</option>\r\n"; }
}
selectInnerHTML += "</select>";
odatelayer.tmpSelectMinuteLayer.style.display="";
odatelayer.tmpSelectMinuteLayer.innerHTML = selectInnerHTML;
odatelayer.tmpSelectMinute.focus();
}

function tmpSelectSecondInnerHTML(strSecond) //秒的下拉框
{
if (!bUseTime){return;}

if (strSecond.match(/\D/)!=null){alert("分钟输入参数不是数字！");return;}
var m = (strSecond) ? strSecond : new Date().getMinutes();
var s = "<select name=tmpSelectSecond style='font-size: 12px' "
s += "onblur='document.all.tmpSelectSecondLayer.style.display=\"none\"' "
s += "onchange='document.all.tmpSelectSecondLayer.style.display=\"none\";"
s += "parent.meizzTheSecond = this.value; parent.evaSetTime(parent.meizzTheHour,parent.meizzTheMinute,parent.meizzTheSecond);'>\r\n";
var selectInnerHTML = s;
for (var i = 0; i < 60; i++)
{
if (i == m) { selectInnerHTML += "<option value='"+i+"' selected>"+i+"</option>\r\n"; }
else { selectInnerHTML += "<option value='"+i+"'>"+i+"</option>\r\n"; }
}
selectInnerHTML += "</select>";
odatelayer.tmpSelectSecondLayer.style.display="";
odatelayer.tmpSelectSecondLayer.innerHTML = selectInnerHTML;
odatelayer.tmpSelectSecond.focus();
}

function closeLayer() //这个层的关闭
{
var o = document.getElementById("endDateLayer");
if (o != null)
{
o.style.display="none";
}
}

function showLayer() //这个层的关闭
{
document.all.endDateLayer.style.display="";
}

function IsPinYear(year) //判断是否闰平年
{
if (0==year%4&&((year%100!=0)||(year%400==0))) return true;else return false;
}

function GetMonthCount(year,month) //闰年二月为29天
{
var c=MonHead[month-1];if((month==2)&&IsPinYear(year)) c++;return c;
}

function GetDOW(day,month,year) //求某天的星期几
{
var dt=new Date(year,month-1,day).getDay()/7; return dt;
}

if (meizzTheMonth<10 && meizzTheMonth.length<2) //格式化成两位数字
{
   parent.meizzTheMonth="0"+parent.meizzTheMonth;
}
if (parent.meizzTheDate<10 && parent.meizzTheDate.length<2) //格式化成两位数字
{
   parent.meizzTheDate="0"+parent.meizzTheDate;
}
//meizzSetDay(meizzTheYear,meizzTheMonth);
if(outObject)
{
   if (bUseTime)
   {
    outObject.value= parent.meizzTheYear + "-" + format( parent.meizzTheMonth) + "-" +
        format(parent.meizzTheDate) + " " + format(parent.meizzTheHour) + ":" +
        format(parent.meizzTheMinute) + ":" + format(parent.meizzTheSecond);
        //注：在这里你可以输出改成你想要的格式
   }
   else
   {
    outObject.value= parent.meizzTheYear + "-" + format( parent.meizzTheMonth) + "-" +
        format(parent.meizzTheDate); //注：在这里你可以输出改成你想要的格式
   }
}
closeLayer();
}
function meizzPrevM() //往前翻月份
{
if(meizzTheMonth>1){meizzTheMonth--}else{meizzTheYear--;meizzTheMonth=12;}
meizzSetDay(meizzTheYear,meizzTheMonth);
}
function meizzNextM() //往后翻月份
{
if(meizzTheMonth==12){meizzTheYear++;meizzTheMonth=1}else{meizzTheMonth++}
meizzSetDay(meizzTheYear,meizzTheMonth);
}

// TODO: 整理代码
function meizzSetDay(yy,mm) //主要的写程序**********
{
meizzWriteHead(yy,mm);
//设置当前年月的公共变量为传入值

meizzTheYear=yy;
meizzTheMonth=mm;

for (var i = 0; i < 37; i++){meizzWDay[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++)meizzWDay[i]=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 < GetMonthCount(yy,mm)+1; i++) { meizzWDay[i]=day1;day1++; }
for (i=firstday+GetMonthCount(yy,mm);i<37;i++) { meizzWDay[i]=day2;day2++; }
for (i = 0; i < 37; i++)
{
var da = eval("odatelayer.meizzDay"+i) //书写新的一个月的日期星期排列

if (meizzWDay[i]!="")
{
   //初始化边框
   da.borderColorLight="#63A3E9";
   da.borderColorDark="#63A3E9";
   da.style.color="#1478eb";
   if(i<firstday)   //上个月的部分
   {
    da.innerHTML="<b><font color=#BCBABC>" + meizzWDay[i] + "</font></b>";
    da.title=(mm==1?12:mm-1) +"月" + meizzWDay[i] + "日";
    da.onclick=Function("meizzDayClick(this.innerText,-1)");

    if(!outDate)
     da.style.backgroundColor = ((mm==1?yy-1:yy) == new Date().getFullYear() &&
      (mm==1?12:mm-1) == new Date().getMonth()+1 && meizzWDay[i] == new Date().getDate()) ?
      "#5CEFA0":"#f5f5f5";
    else
    {
     da.style.backgroundColor =((mm==1?yy-1:yy)==outDate.getFullYear() && (mm==1?12:mm-1)== outDate.getMonth() + 1 &&
     meizzWDay[i]==outDate.getDate())? "#84C1FF" :
     (((mm==1?yy-1:yy) == new Date().getFullYear() && (mm==1?12:mm-1) == new Date().getMonth()+1 &&
     meizzWDay[i] == new Date().getDate()) ? "#5CEFA0":"#f5f5f5");
     //将选中的日期显示为凹下去

     if((mm==1?yy-1:yy)==outDate.getFullYear() && (mm==1?12:mm-1)== outDate.getMonth() + 1 &&
     meizzWDay[i]==outDate.getDate())
     {
      da.borderColorLight="#FFFFFF";
      da.borderColorDark="#63A3E9";
     }
    }
   }
   else if (i>=firstday+GetMonthCount(yy,mm))   //下个月的部分
   {
    da.innerHTML="<b><font color=#BCBABC>" + meizzWDay[i] + "</font></b>";
    da.title=(mm==12?1:mm+1) +"月" + meizzWDay[i] + "日";
    da.onclick=Function("meizzDayClick(this.innerText,1)");
    if(!outDate)
     da.style.backgroundColor = ((mm==12?yy+1:yy) == new Date().getFullYear() &&
      (mm==12?1:mm+1) == new Date().getMonth()+1 && meizzWDay[i] == new Date().getDate()) ?
      "#5CEFA0":"#f5f5f5";
    else
    {
     da.style.backgroundColor =((mm==12?yy+1:yy)==outDate.getFullYear() && (mm==12?1:mm+1)== outDate.getMonth() + 1 &&
     meizzWDay[i]==outDate.getDate())? "#84C1FF" :
     (((mm==12?yy+1:yy) == new Date().getFullYear() && (mm==12?1:mm+1) == new Date().getMonth()+1 &&
     meizzWDay[i] == new Date().getDate()) ? "#5CEFA0":"#f5f5f5");
     //将选中的日期显示为凹下去

     if((mm==12?yy+1:yy)==outDate.getFullYear() && (mm==12?1:mm+1)== outDate.getMonth() + 1 &&
     meizzWDay[i]==outDate.getDate())
     {
      da.borderColorLight="#FFFFFF";
      da.borderColorDark="#63A3E9";
     }
    }
   }
   else   //本月的部分

   {
    da.innerHTML="<b>" + meizzWDay[i] + "</b>";
    da.title=mm +"月" + meizzWDay[i] + "日";
    da.onclick=Function("meizzDayClick(this.innerText,0)");   //给td赋予onclick事件的处理

    //如果是当前选择的日期，则显示亮蓝色的背景；如果是当前日期，则显示暗黄色背景
    if(!outDate)
     da.style.backgroundColor = (yy == new Date().getFullYear() && mm == new Date().getMonth()+1 && meizzWDay[i] == new Date().getDate())?
      "#5CEFA0":"#f5f5f5";
    else
    {
     da.style.backgroundColor =(yy==outDate.getFullYear() && mm== outDate.getMonth() + 1 && meizzWDay[i]==outDate.getDate())?
      "#84C1FF":((yy == new Date().getFullYear() && mm == new Date().getMonth()+1 && meizzWDay[i] == new Date().getDate())?
      "#5CEFA0":"#f5f5f5");
     //将选中的日期显示为凹下去

     if(yy==outDate.getFullYear() && mm== outDate.getMonth() + 1 && meizzWDay[i]==outDate.getDate())
     {
      da.borderColorLight="#FFFFFF";
      da.borderColorDark="#63A3E9";
     }
    }
   }
     da.style.cursor="hand"
    }
   else { da.innerHTML="";da.style.backgroundColor="";da.style.cursor="default"; }
}
}

function meizzDayClick(n,ex) //点击显示框选取日期，主输入函数*************
{
parent.meizzTheDate=n;
var yy=meizzTheYear;
var mm = parseInt(meizzTheMonth)+ex; //ex表示偏移量，用于选择上个月份和下个月份的日期
var hh=meizzTheHour;
var mi=meizzTheMinute;
var se=meizzTheSecond;
//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 (hh<10)   {hh="0" + hh;} //时
if (mi<10)   {mi="0" + mi;} //分
if (se<10)   {se="0" + se;} //秒

if (outObject)
{
   if (!n) { //outObject.value="";
    return;}
   if ( n < 10){n = "0" + n;}

WriteDateTo(yy,mm,n,hh,mi,se);

   closeLayer();
   if (bUseTime)
   {
    try
    {
     outButton.click();
    }
    catch (e)
    {
     setday(outObject);
    }
   }
}
else {closeLayer(); alert("您所要输出的控件对象并不存在！");}
}

function format(n) //格式化数字为两位字符表示
{
var m=new String();
var tmp=new String(n);
if (n<10 && tmp.length<2)
{
m="0"+n;
}
else
{
m=n;
}
return m;
}

function evaSetTime() //设置用户选择的小时、分钟
{
odatelayer.meizzHourHead.innerText=meizzTheHour+" 时";
odatelayer.meizzMinuteHead.innerText=meizzTheMinute+" 分";
odatelayer.meizzSecondHead.innerText=meizzTheSecond+" 秒";
WriteDateTo(meizzTheYear,meizzTheMonth,meizzTheDate,meizzTheHour,meizzTheMinute,meizzTheSecond)
}

function evaSetTimeNothing() //设置时间控件为空
{
odatelayer.meizzHourHead.innerText="";
odatelayer.meizzMinuteHead.innerText="";
odatelayer.meizzSecondHead.innerText="";
WriteDateTo(meizzTheYear,meizzTheMonth,meizzTheDate,meizzTheHour,meizzTheMinute,meizzTheSecond)
}

function evaSetTimeNow() //设置时间控件为当前时间
{
odatelayer.meizzHourHead.innerText=new Date().getHours()+" 时";
odatelayer.meizzMinuteHead.innerText=new Date().getMinutes()+" 分";
odatelayer.meizzSecondHead.innerText=new Date().getSeconds()+" 秒";
meizzTheHour = new Date().getHours();
meizzTheMinute = new Date().getMinutes();
meizzTheSecond = new Date().getSeconds();
WriteDateTo(meizzTheYear,meizzTheMonth,meizzTheDate,meizzTheHour,meizzTheMinute,meizzTheSecond)
}

function WriteDateTo(yy,mm,n,hh,mi,se)
{
if (bUseTime)
{
outObject.value= yy + "-" + format(mm) + "-" + format(n) + " " + format(hh) + ":" + format(mi) + ":" + format(se); //注：在这里你可以输出改成你想要的格式
}
else
{
outObject.value= yy + "-" + format(mm) + "-" + format(n); //注：在这里你可以输出改成你想要的格式
}
}

function bImgSwitch()
{
if (bUseTime)
{
bImg="开启";
}
else
{
bImg="关闭";
}
}

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JS轻松实现单击文本框弹出选择日期

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