一个写得较好的JavaScript日期挑选控件

由于是在网络上无意间找到的一个例程，所以不知道原作者，在此还请原作者见谅！
完整源代码如下：



直接用的JS日期控件
';
strFrame+='INPUT.button{BORDER-RIGHT: #63A3E9 1px solid;BORDER-TOP: #63A3E9 1px solid;BORDER-LEFT: #63A3E9 1px solid;';
strFrame+='BORDER-BOTTOM: #63A3E9 1px solid;BACKGROUND-COLOR: #63A3E9;font-family:宋体;}';
strFrame+='TD{FONT-SIZE: 9pt;font-family:宋体;}';
strFrame+='';
strFrame+='';
strFrame+='var datelayerx,datelayery;';
strFrame+='var bDrag;';
strFrame+='function document.onmousemove()';
strFrame+='{if(bDrag && window.event.button==1)';
strFrame+=' {var DateLayer=parent.document.all.endDateLayer.style;';
strFrame+=' DateLayer.posLeft += window.event.clientX-datelayerx;';
strFrame+=' DateLayer.posTop += window.event.clientY-datelayery;}}';
strFrame+='function DragStart()';
strFrame+='{var DateLayer=parent.document.all.endDateLayer.style;';
strFrame+=' datelayerx=window.event.clientX;';
strFrame+=' datelayery=window.event.clientY;';
strFrame+=' bDrag=true;}';
strFrame+='function DragEnd(){';
strFrame+=' bDrag=false;}';
strFrame+='';
strFrame+='';
strFrame+='';
strFrame+='';
strFrame+='';
strFrame+='';
strFrame+='';
strFrame+='';
strFrame+=' ';
strFrame+=' ';
strFrame+=' ';
strFrame+=' [/b]';
strFrame+=' ';
strFrame+=' ';
strFrame+=' ';
strFrame+=' ';
strFrame+=' 日';
strFrame+=' 一 二';
strFrame+=' 三 四';
strFrame+=' 五 六';
strFrame+='';
strFrame+=' ';
strFrame+=' ';
var n=0; for (j=0;j 2){alert("對不起！傳入本控件的參數太多！");return;}
if (arguments.length == 0){alert("對不起！您沒有傳回本控件任何參數");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+" 時"):"";
odatelayer.meizzMinuteHead.innerText=bUseTime?(meizzTheMinute+" 分"):"";
odatelayer.meizzSecondHead.innerText=bUseTime?(meizzTheSecond+" 秒"):"";
}
function tmpSelectYearInnerHTML(strYear) //年份的下拉框
{
if (strYear.match(/\D/)!=null){alert("年份輸入參數不是數字！");return;}
var m = (strYear) ? strYear : new Date().getFullYear();
if (m < 1000 || m > 9999) {alert("年份值不在 1000 到 9999 之間！");return;}
var n = m - 50;
if (n < 1000) n = 1000;
if (n + 101 > 9999) n = 9974;
var s = " \r\n";
var selectInnerHTML = s;
for (var i = n; i < n + 101; i++)
{
if (i == m) { selectInnerHTML += "" + i + "年" + "\r\n"; }
else { selectInnerHTML += "" + i + "年" + "\r\n"; }
}
selectInnerHTML += "";
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("月份輸入參數不是數字！");return;}
var m = (strMonth) ? strMonth : new Date().getMonth() + 1;
var s = " \r\n";
var selectInnerHTML = s;
for (var i = 1; i < 13; i++)
{
if (i == m) { selectInnerHTML += ""+i+"月"+"\r\n"; }
else { selectInnerHTML += ""+i+"月"+"\r\n"; }
}
selectInnerHTML += "";
odatelayer.tmpSelectMonthLayer.style.display="";
odatelayer.tmpSelectMonthLayer.innerHTML = selectInnerHTML;
odatelayer.tmpSelectMonth.focus();
}
/***** 增加 小时、分钟 ***/
function tmpSelectHourInnerHTML(strHour) //小时的下拉框
{
if (!bUseTime){return;}
if (strHour.match(/\D/)!=null){alert("小時輸入參數不是數字！");return;}
var m = (strHour) ? strHour : new Date().getHours();
var s = "\r\n";
var selectInnerHTML = s;
for (var i = 0; i < 24; i++)
{
if (i == m) { selectInnerHTML += ""+i+"\r\n"; }
else { selectInnerHTML += ""+i+"\r\n"; }
}
selectInnerHTML += "";
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("分鐘輸入數字不是數字！");return;}
var m = (strMinute) ? strMinute : new Date().getMinutes();
var s = "\r\n";
var selectInnerHTML = s;
for (var i = 0; i < 60; i++)
{
if (i == m) { selectInnerHTML += ""+i+"\r\n"; }
else { selectInnerHTML += ""+i+"\r\n"; }
}
selectInnerHTML += "";
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("秒鐘輸入參數不是數字！");return;}
var m = (strSecond) ? strSecond : new Date().getMinutes();
var s = "\r\n";
var selectInnerHTML = s;
for (var i = 0; i < 60; i++)
{
if (i == m) { selectInnerHTML += ""+i+"\r\n"; }
else { selectInnerHTML += ""+i+"\r\n"; }
}
selectInnerHTML += "";
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;
}
function meizzPrevY() //往前翻 Year
{
if(meizzTheYear > 999 && meizzTheYear 999 && meizzTheYear