一个完美的日期控件 + 一个用脚本断判日期型的方法（1）

1. 一个类似于Calendar日期控件，不用再刷新页面。
2. 判断文本控件里的值是否能转换成日期型。

.Js 例1：
/*
 *coolWindowsCalendar.js
 *
 */

//------------------------------------------------------------------------------------------------------
var bMoveable=true;
var _VersionInfo="原创:walkingpoison;修改者:不人不义;MAIL: [email protected]" ;
//==================================================== WEB 页面显示部分 =====================================================
var strFrame;        //存放日历层的HTML代码
document.writeln('<iframe id=meizzDateLayer Author=wayx frameborder=0 style="position: absolute; width: 144; height: 211; z-index: 9998; display: none"></iframe>');
strFrame='<style>';
strFrame+='INPUT.button{BORDER-RIGHT: #ff9900 1px solid;BORDER-TOP: #ff9900 1px solid;BORDER-LEFT: #ff9900 1px solid;';
strFrame+='BORDER-BOTTOM: #ff9900 1px solid;BACKGROUND-COLOR: #fff8ec;font-family:宋体;}';
strFrame+='TD{FONT-SIZE: 9pt;font-family:宋体;}';
strFrame+='</style>';
strFrame+='<scr' + 'ipt>';
strFrame+='var datelayerx,datelayery;    /*存放日历控件的鼠标位置*/';
strFrame+='var bDrag;    /*标记是否开始拖动*/';
strFrame+='function document.onmousemove()    /*在鼠标移动事件中，如果开始拖动日历，则移动日历*/';
strFrame+='{if(bDrag && window.event.button==1)';
strFrame+='    {var DateLayer=parent.document.all.meizzDateLayer.style;';
strFrame+='        DateLayer.posLeft += window.event.clientX-datelayerx;/*由于每次移动以后鼠标位置都恢复为初始的位置，因此写法与div中不同*/';
strFrame+='        DateLayer.posTop += window.event.clientY-datelayery;}}';
strFrame+='function DragStart()        /*开始日历拖动*/';
strFrame+='{var DateLayer=parent.document.all.meizzDateLayer.style;';
strFrame+='    datelayerx=window.event.clientX;';
strFrame+='    datelayery=window.event.clientY;';
strFrame+='    bDrag=true;}';
strFrame+='function DragEnd(){        /*结束日历拖动*/';
strFrame+='    bDrag=false;}';
strFrame+='</scr' + 'ipt>';
strFrame+='<div style="z-index:9999;position: absolute; left:0; top:0;" onselectstart="return false"><span id=tmpSelectYearLayer Author=wayx style="z-index: 9999;position: absolute;top: 3; left: 19;display: none"></span>';
strFrame+='<span id=tmpSelectMonthLayer Author=wayx style="z-index: 9999;position: absolute;top: 3; left: 78;display: none"></span>';
strFrame+='<table border=1 cellspacing=0 cellpadding=0 width=142 height=160 bordercolor=#ff9900 bgcolor=#ff9900 Author="wayx">';
strFrame+=' <tr Author="wayx"><td width=142 height=23 Author="wayx" bgcolor=#FFFFFF><table border=0 cellspacing=1 cellpadding=0 width=140 Author="wayx" height=23>';
strFrame+=' <tr align=center Author="wayx"><td width=16 align=center bgcolor=#ff9900 style="font-size:12px;cursor: hand;color: #ffffff" ';
strFrame+=' onclick="parent.meizzPrevM()" title="向前翻 1 月" Author=meizz><b Author=meizz>&lt;</b>';
strFrame+=' </td><td width=60 align=center style="font-size:12px;cursor:default" Author=meizz ';
strFrame+='onmouseover="style.backgroundColor=\'#FFD700\'" onmouseout="style.backgroundColor=\'white\'" ';
strFrame+='onclick="parent.tmpSelectYearInnerHTML(this.innerText.substring(0,4))" title="点击这里选择年份"><span Author=meizz id=meizzYearHead></span></td>';
strFrame+='<td width=48 align=center style="font-size:12px;cursor:default" Author=meizz onmouseover="style.backgroundColor=\'#FFD700\'" ';
strFrame+=' onmouseout="style.backgroundColor=\'white\'" onclick="parent.tmpSelectMonthInnerHTML(this.innerText.length==3?this.innerText.substring(0,1):this.innerText.substring(0,2))"';
strFrame+=' title="点击这里选择月份"><span id=meizzMonthHead Author=meizz></span></td>';
strFrame+=' <td width=16 bgcolor=#ff9900 align=center style="font-size:12px;cursor: hand;color: #ffffff" ';
strFrame+=' onclick="parent.meizzNextM()" title="向后翻 1 月" Author=meizz><b Author=meizz>&gt;</b></td></tr>';
strFrame+=' </table></td></tr>';
strFrame+=' <tr Author="wayx"><td width=142 height=18 Author="wayx">';
strFrame+='<table border=1 cellspacing=0 cellpadding=0 bgcolor=#ff9900 ' + (bMoveable? 'onmousedown="DragStart()" onmouseup="DragEnd()"':'');
strFrame+=' BORDERCOLORLIGHT=#FF9900 BORDERCOLORDARK=#FFFFFF width=140 height=20 Author="wayx" style="cursor:' + (bMoveable ? 'move':'default') + '">';
strFrame+='<tr Author="wayx" align=center valign=bottom><td style="font-size:12px;color:#FFFFFF" Author=meizz>日</td>';
strFrame+='<td style="font-size:12px;color:#FFFFFF" Author=meizz>一</td><td style="font-size:12px;color:#FFFFFF" Author=meizz>二</td>';
strFrame+='<td style="font-size:12px;color:#FFFFFF" Author=meizz>三</td><td style="font-size:12px;color:#FFFFFF" Author=meizz>四</td>';
strFrame+='<td style="font-size:12px;color:#FFFFFF" Author=meizz>五</td><td style="font-size:12px;color:#FFFFFF" Author=meizz>六</td></tr>';
strFrame+='</table></td></tr><!-- Author:F.R.Huang(meizz) http://www.meizz.com/mail: [email protected] 2002-10-8 -->';
strFrame+=' <tr Author="wayx"><td width=142 height=120 Author="wayx">';
strFrame+=' <table border=1 cellspacing=2 cellpadding=0 BORDERCOLORLIGHT=#FF9900 BORDERCOLORDARK=#FFFFFF bgcolor=#fff8ec width=140 height=120 Author="wayx">';
var n=0; for (j=0;j<5;j++){ strFrame+= ' <tr align=center Author="wayx">'; for (i=0;i<7;i++){
strFrame+='<td width=20 height=20 id=meizzDay'+n+' style="font-size:12px" Author=meizz onclick=parent.meizzDayClick(this.innerText,0)></td>';n++;}
strFrame+='</tr>';}
strFrame+=' <tr align=center Author="wayx">';
for (i=35;i<39;i++)strFrame+='<td width=20 height=20 id=meizzDay'+i+' style="font-size:12px" Author=wayx onclick="parent.meizzDayClick(this.innerText,0)"></td>';
strFrame+=' <td colspan=3 align=right Author=meizz><span onclick=parent.closeLayer() style="font-size:12px;cursor: hand"';
strFrame+=' Author=meizz title="' + _VersionInfo + '"><u>关闭</u></span>&nbsp;</td></tr>';
strFrame+=' </table></td></tr><tr Author="wayx"><td Author="wayx">';
strFrame+=' <table border=0 cellspacing=1 cellpadding=0 width=100% Author="wayx" bgcolor=#FFFFFF>';
strFrame+=' <tr Author="wayx"><td Author=meizz align=left><input Author=meizz type=button class=button value="<<" title="向前翻 1 年" onclick="parent.meizzPrevY()" ';
strFrame+=' onfocus="this.blur()" style="font-size: 12px; height: 20px"><input Author=meizz class=button title="向前翻 1 月" type=button ';
strFrame+=' value="< " onclick="parent.meizzPrevM()" onfocus="this.blur()" style="font-size: 12px; height: 20px"></td><td ';
strFrame+=' Author=meizz align=center><input Author=meizz type=button class=button value=Today onclick="parent.meizzToday()" ';
strFrame+=' onfocus="this.blur()" title="当前日期" style="font-size: 12px; height: 20px; cursor:hand"></td><td ';
strFrame+=' Author=meizz align=right><input Author=meizz type=button class=button value=" >" onclick="parent.meizzNextM()" ';
strFrame+=' onfocus="this.blur()" title="向后翻 1 月" class=button style="font-size: 12px; height: 20px"><input ';
strFrame+=' Author=meizz type=button class=button value=">>" title="向后翻 1 年" onclick="parent.meizzNextY()"';
strFrame+=' onfocus="this.blur()" style="font-size: 12px; height: 20px"></td>';
strFrame+='</tr></table></td></tr></table></div>';

window.frames.meizzDateLayer.document.writeln(strFrame);
window.frames.meizzDateLayer.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 odatelayer=window.frames.meizzDateLayer.document.all;        //存放日历对象
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.meizzDateLayer.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})$/;
    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;        //保存外部传入的日期
        }
        else outDate="";
            meizzSetDay(r[1],r[2]+1);
    }
    else{
        outDate="";
        meizzSetDay(new Date().getFullYear(), new Date().getMonth() + 1);
    }
    dads.display = '';

    event.returnValue=false;
}

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 meizzWDay=new Array(39); //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.getAttribute("Author")==null && 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.getAttribute("Author")==null && document.activeElement != outObject && document.activeElement != outButton)
        {
            closeLayer();
        }
}

function meizzWriteHead(yy,mm) //往 head 中写入当前的年与月
{
    odatelayer.meizzYearHead.innerText = yy + " 年";
odatelayer.meizzMonthHead.innerText = mm + " 月";
}

function tmpSelectYearInnerHTML(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 Author=meizz name=tmpSelectYear style='font-size: 12px' "
s += "onblur='document.all.tmpSelectYearLayer.style.display=\"none\"' "
s += "onchange='document.all.tmpSelectYearLayer.style.display=\"none\";"
s += "parent.meizzTheYear = this.value; parent.meizzSetDay(parent.meizzTheYear,parent.meizzTheMonth)'>\r\n";
var selectInnerHTML = s;
for (var i = n; i < n + 26; i++)
{
if (i == m)
{selectInnerHTML += "<option Author=wayx value='" + i + "' selected>" + i + "年" + "</option>\r\n";}
else {selectInnerHTML += "<option Author=wayx value='" + i + "'>" + i + "年" + "</option>\r\n";}
}
selectInnerHTML += "</select>";
odatelayer.tmpSelectYearLayer.style.display="";
odatelayer.tmpSelectYearLayer.innerHTML = selectInnerHTML;
odatelayer.tmpSelectYear.focus();
}

function tmpSelectMonthInnerHTML(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 Author=meizz name=tmpSelectMonth style='font-size: 12px' "
s += "onblur='document.all.tmpSelectMonthLayer.style.display=\"none\"' "
s += "onchange='document.all.tmpSelectMonthLayer.style.display=\"none\";"
s += "parent.meizzTheMonth = this.value; parent.meizzSetDay(parent.meizzTheYear,parent.meizzTheMonth)'>\r\n";
var selectInnerHTML = s;
for (var i = 1; i < 13; i++)
{
if (i == m)
{selectInnerHTML += "<option Author=wayx value='"+i+"' selected>"+i+"月"+"</option>\r\n";}
else {selectInnerHTML += "<option Author=wayx value='"+i+"'>"+i+"月"+"</option>\r\n";}
}
selectInnerHTML += "</select>";
odatelayer.tmpSelectMonthLayer.style.display="";
odatelayer.tmpSelectMonthLayer.innerHTML = selectInnerHTML;
odatelayer.tmpSelectMonth.focus();
}

function closeLayer() //这个层的关闭
{
document.all.meizzDateLayer.style.display="none";
}

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;
}

function meizzPrevY() //往前翻 Year
{
if(meizzTheYear > 999 && meizzTheYear <10000){meizzTheYear--;}
else{alert("年份超出范围（1000-9999）！");}
meizzSetDay(meizzTheYear,meizzTheMonth);
}
function meizzNextY() //往后翻 Year
{
if(meizzTheYear > 999 && meizzTheYear <10000){meizzTheYear++;}
else{alert("年份超出范围（1000-9999）！");}
meizzSetDay(meizzTheYear,meizzTheMonth);
}
function meizzToday() //Today Button
{
    var today;
meizzTheYear = new Date().getFullYear();
meizzTheMonth = new Date().getMonth()+1;
today=new Date().getDate();
//meizzSetDay(meizzTheYear,meizzTheMonth);
if(outObject){
        outObject.value=meizzTheYear + "-" + meizzTheMonth + "-" + today;
}
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);
}

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 < 39; 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<39;i++){meizzWDay[i]=day2;day2++}
for (i = 0; i < 39; 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="#FF9900";
        da.borderColorDark="#FFFFFF";
        if(i<firstday)        //上个月的部分
        {
            da.innerHTML="<b><font color=gray>" + 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()) ?
                     "#FFD700":"#e0e0e0";
            else
            {
                da.style.backgroundColor =((mm==1?yy-1:yy)==outDate.getFullYear() && (mm==1?12:mm-1)== outDate.getMonth() + 1 &&
                meizzWDay[i]==outDate.getDate())? "#00ffff" :
                (((mm==1?yy-1:yy) == new Date().getFullYear() && (mm==1?12:mm-1) == new Date().getMonth()+1 &&
                meizzWDay[i] == new Date().getDate()) ? "#FFD700":"#e0e0e0");
                //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="#FF9900";
                }
            }
        }
        else if (i>=firstday+GetMonthCount(yy,mm))        //下个月的部分
        {
            da.innerHTML="<b><font color=gray>" + 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()) ?
                     "#FFD700":"#e0e0e0";
            else
            {
                da.style.backgroundColor =((mm==12?yy+1:yy)==outDate.getFullYear() && (mm==12?1:mm+1)== outDate.getMonth() + 1 &&
                meizzWDay[i]==outDate.getDate())? "#00ffff" :
                (((mm==12?yy+1:yy) == new Date().getFullYear() && (mm==12?1:mm+1) == new Date().getMonth()+1 &&
                meizzWDay[i] == new Date().getDate()) ? "#FFD700":"#e0e0e0");
                //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="#FF9900";
                }
            }
        }
        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())?
                    "#FFD700":"#e0e0e0";
            else
            {
                da.style.backgroundColor =(yy==outDate.getFullYear() && mm== outDate.getMonth() + 1 && meizzWDay[i]==outDate.getDate())?
                    "#00ffff":((yy == new Date().getFullYear() && mm == new Date().getMonth()+1 && meizzWDay[i] == new Date().getDate())?
                    "#FFD700":"#e0e0e0");
                //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="#FF9900";
                }
            }
        }
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*************
{
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
    //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 (outObject)
{
if (!n) {//outObject.value="";
return;}
if ( n < 10){n = "0" + n;}
outObject.value= yy + "-" + mm + "-" + n ; //注：在这里你可以输出改成你想要的格式
outObject.realValue= yy + "-" + mm + "-" + n ;//与别一个JS文件接应 (xpMask.htc) // 囨囚囨図添加 //
closeLayer();
}
else {closeLayer(); alert("您所要输出的控件对象并不存在！");}
}
//------------------------------------------------------------------------------------------------------

Html 例：
/*
 *<script src="../JScript/coolWindowsCalendar.js"></script>
 *setday(this,[object])和setday(this)
 *[object]是控件输出的控件名
 *<input name=txt>
 *<input type=button value=setday onclick="setday(this,document.all.txt)">
 *<input onfocus="setday(this)">
 */

如图：

接下遍---->>

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