鉴于网上找到的几个日期选择程序有些问题，遂着手重写一个程序，大部分还是借鉴前人的代码，添加了时间选择功能，隐藏会遮挡控件的标签select，object。
开始本想使用window.createPopup()来弹出日历的选择，这样就可以跨过任何标签。
不过做到中途发现用createPopup窗口实现理论上是行不通的：
一是因为不在窗体里单击任何地方都会关闭窗口，而当用下拉框选择年份时，很有可能会单击到窗体外的地方，当然这个可以自己写select来避免，但是比较麻烦；
二是窗体的宽度和高度只能在弹出时设置，而显然，在选择不同年月时，控件高度是要发生改变的。
鉴于上面的原因，还是决定采用普通的处理方法。
[img]http://files.jb51.net/file_images/article/201308/201382153019449.gif?201372153055[/img]
Calendar.js:
[url=javascript:tiannetClear();]' <a href="javascript:tiannetHideControl();" style="' + s_tiannet_link + '">关闭</a>' +
' <a href="javascript:tiannetSetValue(true);" style="' + s_tiannet_link + '">确定</a> ' +
'</td>');
document.write (' </tr>');
document.write('</table>');
document.write('</div>');
//------------------ end 页面显示部分 ---------------------------//
//------------------ 显示日期时间的span标签响应事件 ---------------------------//
//单击年份span标签响应
function spanYearCEvent(){
hideElementsById(new Array("selTianYear","tiannetMonthHead"),false);
if(m_bolShowHour) hideElementsById(new Array("tiannetHourHead"),false);
if(m_bolShowMinute) hideElementsById(new Array("tiannetMinuteHead"),false);
hideElementsById(new Array("tiannetYearHead","selTianMonth","selTianHour","selTianMinute"),true);
}
//单击月份span标签响应
function spanMonthCEvent(){
hideElementsById(new Array("selTianMonth","tiannetYearHead"),false);
if(m_bolShowHour) hideElementsById(new Array("tiannetHourHead"),false);
if(m_bolShowMinute) hideElementsById(new Array("tiannetMinuteHead"),false);
hideElementsById(new Array("tiannetMonthHead","selTianYear","selTianHour","selTianMinute"),true);
}
//单击小时span标签响应
function spanHourCEvent(){
hideElementsById(new Array("tiannetYearHead","tiannetMonthHead"),false);
if(m_bolShowHour) hideElementsById(new Array("selTianHour"),false);
if(m_bolShowMinute) hideElementsById(new Array("tiannetMinuteHead"),false);
hideElementsById(new Array("tiannetHourHead","selTianYear","selTianMonth","selTianMinute"),true);
}
//单击分钟span标签响应
function spanMinuteCEvent(){
hideElementsById(new Array("tiannetYearHead","tiannetMonthHead"),false);
if(m_bolShowHour) hideElementsById(new Array("tiannetHourHead"),false);
if(m_bolShowMinute) hideElementsById(new Array("selTianMinute"),false);
hideElementsById(new Array("tiannetMinuteHead","selTianYear","selTianMonth","selTianHour"),true);
}
//根据标签id隐藏或显示标签
function hideElementsById(arrId,bolHide){
var strDisplay = "";
if(bolHide) strDisplay = "none";
for(var i = 0;i < arrId.length;i ++){
var obj = document.getElementById(arrId[i]);
obj.style.display = strDisplay;
}
}
//------------------ end 显示日期时间的span标签响应事件 ---------------------------//
//判断某年是否为闰年
function isPinYear(year){
var bolRet = false;
if (0==year%4&&((year0!=0)||(year%400==0))) {
bolRet = true;
}
return bolRet;
}
//得到一个月的天数，闰年为29天
function getMonthCount(year,month){
var c=m_aMonHead[month-1];
if((month==2)&&isPinYear(year)) c++;
return c;
}
//重新设置当前的日。主要是防止在翻年、翻月时，当前日大于当月的最大日
function setRealDayCount() {
if( tiannetDay > getMonthCount(tiannetYear,tiannetMonth) ) {
//如果当前的日大于当月的最大日，则取当月最大日
tiannetDay = getMonthCount(tiannetYear,tiannetMonth);
}
}
//在个位数前加零
function addZero(value){
if(value < 10 ){
value = "0" + value;
}
return value;
}
//取出空格
function tiannetTrim(str) {
return str.replace(/(^\s*)|(\s*$)/g,"");
}
//为select创建一个option
function createOption(objSelect,value,text){
var option = document.createElement("OPTION");
option.value = value;
option.text = text;
objSelect.options.add(option);
}
//往前翻 Year
function tiannetPrevYear() {
if(tiannetYear > 999 && tiannetYear <10000){tiannetYear--;}
else{alert("年份超出范围（1000-9999）！");}
tiannetSetDay(tiannetYear,tiannetMonth);
//如果年份小于允许的最小年份，则创建对应的option
if( tiannetYear < tiannetYearSt ) {
tiannetYearSt = tiannetYear;
createOption(document.all.selTianYear,tiannetYear,tiannetYear + "年");
}
checkSelect(document.all.selTianYear,tiannetYear);
tiannetWriteHead();
}
//往后翻 Year
function tiannetNextYear() {
if(tiannetYear > 999 && tiannetYear <10000){tiannetYear++;}
else{alert("年份超出范围（1000-9999）！");return;}
tiannetSetDay(tiannetYear,tiannetMonth);
//如果年份超过允许的最大年份，则创建对应的option
if( tiannetYear > tiannetYearEnd ) {
tiannetYearEnd = tiannetYear;
createOption(document.all.selTianYear,tiannetYear,tiannetYear + "年");
}
checkSelect(document.all.selTianYear,tiannetYear);
tiannetWriteHead();
}
//选择今天
function tiannetToday() {
tiannetYear = tiannetDateNow.getFullYear();
tiannetMonth = tiannetDateNow.getMonth()+1;
tiannetDay = tiannetDateNow.getDate();
tiannetSetValue(true);
//tiannetSetDay(tiannetYear,tiannetMonth);
//selectObject();
}
//往前翻月份
function tiannetPrevMonth() {
if(tiannetMonth>1){tiannetMonth--}else{tiannetYear--;tiannetMonth=12;}
tiannetSetDay(tiannetYear,tiannetMonth);
checkSelect(document.all.selTianMonth,tiannetMonth);
tiannetWriteHead();
}
//往后翻月份
function tiannetNextMonth() {
if(tiannetMonth==12){tiannetYear++;tiannetMonth=1}else{tiannetMonth++}
tiannetSetDay(tiannetYear,tiannetMonth);
checkSelect(document.all.selTianMonth,tiannetMonth);
tiannetWriteHead();
}
//向span标签中写入年、月、时、分等数据
function tiannetWriteHead(){
document.all.tiannetYearHead.innerText = tiannetYear + "年";
document.all.tiannetMonthHead.innerText = tiannetMonth + "月";
if( m_bolShowHour ) document.all.tiannetHourHead.innerText = " "+tiannetHour + "时";
if( m_bolShowMinute ) document.all.tiannetMinuteHead.innerText = tiannetMinute + "分";
tiannetSetValue(false);//给文本框赋值，但不隐藏本控件
}
//设置显示天
function tiannetSetDay(yy,mm) {
setRealDayCount();//设置当月真实的日
tiannetWriteHead();
var strDateFont1 = "", strDateFont2 = "" //处理日期显示的风格
for (var i = 0; i < 37; i++){tiannetArrDay[i]=""}; //将显示框的内容全部清空
var day1 = 1;
var firstday = new Date(yy,mm-1,1).getDay(); //某月第一天的星期几
for (var i = firstday; day1 < getMonthCount(yy,mm)+1; i++){
tiannetArrDay[i]=day1;day1++;
}
//如果用于显示日的最后一行的第一个单元格的值为空，则隐藏整行。
//if(tiannetArrDay[35] == ""){
// document.all.trTiannetDay5.style.display = "none";
//} else {
// document.all.trTiannetDay5.style.display = "";
//}
for (var i = 0; i < 37; i++){
var da = eval("document.all.tdTiannetDay"+i) //书写新的一个月的日期星期排列
if (tiannetArrDay[i]!="") {
//判断是否为周末，如果是周末，则改为红色字体
if(i % 7 == 0 || (i+1) % 7 == 0){
strDateFont1 = "<font color=#f0000>"
strDateFont2 = "</font>"
} else {
strDateFont1 = "";
strDateFont2 = ""
}
da.innerHTML = strDateFont1 + tiannetArrDay[i] + strDateFont2;
//如果是当前选择的天，则改变颜色
if(tiannetArrDay[i] == tiannetDay ) {
da.style.backgroundColor = "#CCCCCC";
} else {
da.style.backgroundColor = "#EFEFEF";
}
da.style.cursor="hand"
} else {
da.innerHTML="";da.style.backgroundColor="";da.style.cursor="default"
}
}//end for
tiannetSetValue(false);//给文本框赋值，但不隐藏本控件
}//end function tiannetSetDay
//根据option的值选中option
function checkSelect(objSelect,selectValue) {
var count = parseInt(objSelect.length);
if( selectValue < 10 && selectValue.toString().length == 2) {
selectValue = selectValue.substring(1,2);
}
for(var i = 0;i < count;i ++){
if(objSelect.options[i].value == selectValue){
objSelect.selectedIndex = i;
break;
}
}//for
}
//选中年、月、时、分等下拉框
function selectObject(){
//如果年份小于允许的最小年份，则创建对应的option
if( tiannetYear < tiannetYearSt ) {
for( var i = tiannetYear;i < tiannetYearSt;i ++ ){
createOption(document.all.selTianYear,i,i + "年");
}
tiannetYearSt = tiannetYear;
}
//如果年份超过允许的最大年份，则创建对应的option
if( tiannetYear > tiannetYearEnd ) {
for( var i = tiannetYearEnd+1;i <= tiannetYear;i ++ ){
createOption(document.all.selTianYear,i,i + "年");
}
tiannetYearEnd = tiannetYear;
}
checkSelect(document.all.selTianYear,tiannetYear);
checkSelect(document.all.selTianMonth,tiannetMonth);
if( m_bolShowHour ) checkSelect(document.all.selTianHour,tiannetHour);
if( m_bolShowMinute ) checkSelect(document.all.selTianMinute,tiannetMinute);
}
//给接受日期时间的控件赋值
//参数bolHideControl - 是否隐藏控件
function tiannetSetValue(bolHideControl){
var value = "";
if( !tiannetDay || tiannetDay == "" ){
tiannetOutObject.value = value;
return;
}
var mm = tiannetMonth;
var day = tiannetDay;
if( mm < 10 && mm.toString().length == 1) mm = "0" + mm;
if( day < 10 && day.toString().length == 1) day = "0" + day;
value = tiannetYear + tiannetDateSplit + mm + tiannetDateSplit + day;
if( m_bolShowHour ){
var hour = tiannetHour;
if( hour < 10 && hour.toString().length == 1 ) hour = "0" + hour;
value += tiannetDateTimeSplit + hour;
}
if( m_bolShowMinute ){
var minute = tiannetMinute;
if( minute < 10 && minute.toString().length == 1 ) minute = "0" + minute;
value += tiannetTimeSplit + minute;
}
tiannetOutObject.value = value;
//document.all.divTiannetDate.style.display = "none";
if( bolHideControl ) {
tiannetHideControl();
}
}
//是否显示时间
function showTime(){
if( !m_bolShowHour && m_bolShowMinute){
alert("如果要选择分钟，则必须可以选择小时！");
return;
}
hideElementsById(new Array("tiannetHourHead","selTianHour","tiannetMinuteHead","selTianMinute"),true);
if( m_bolShowHour ){
//显示小时
hideElementsById(new Array("tiannetHourHead"),false);
}
if( m_bolShowMinute ){
//显示分钟
hideElementsById(new Array("tiannetMinuteHead"),false);
}
}
//弹出显示日历选择控件，以让用户选择
function tiannetPopCalendar(){
//隐藏下拉框，显示相对应的head
hideElementsById(new Array("selTianYear","selTianMonth","selTianHour","selTianMinute"),true);
hideElementsById(new Array("tiannetYearHead","tiannetMonthHead","tiannetHourHead","tiannetMinuteHead"),false);
tiannetSetDay(tiannetYear,tiannetMonth);
tiannetWriteHead();
showTime();
var dads = document.all.divTiannetDate.style;
var iX, iY;
var h = document.all.divTiannetDate.offsetHeight;
var w = document.all.divTiannetDate.offsetWidth;
//计算left
if (window.event.x + h > document.body.offsetWidth - 10 )
iX = window.event.x - h - 5 ;
else
iX = window.event.x + 5;
if (iX <0)
iX=0;
//计算top
iY = window.event.y;
if (window.event.y + w > document.body.offsetHeight - 10 )
iY = document.body.scrollTop + document.body.offsetHeight - w - 5 ;
else
iY = document.body.scrollTop +window.event.y + 5;
if (iY <0)
iY=0;
dads.left = iX;
dads.top = iY;
tiannetShowControl();
selectObject();
}
//隐藏日历控件(同时显示被强制隐藏的标签)
function tiannetHideControl(){
document.all.divTiannetDate.style.display = "none";
tiannetShowObject();
arrTiannetHide = new Array();//将被隐藏的标签对象清空
}
//显示日历控件(同时隐藏会遮挡的标签)
function tiannetShowControl(){
document.all.divTiannetDate.style.display = "";
tiannetHideObject("SELECT");
tiannetHideObject("OBJECT");
}
//根据标签名称隐藏标签。如会遮住控件的select，object
function tiannetHideObject(strTagName) {
x = document.all.divTiannetDate.offsetLeft;
y = document.all.divTiannetDate.offsetTop;
h = document.all.divTiannetDate.offsetHeight;
w = document.all.divTiannetDate.offsetWidth;
for (var i = 0; i < document.all.tags(strTagName).length; i++)
{
var obj = document.all.tags(strTagName)[i];
if (! obj || ! obj.offsetParent)
continue;
// 获取元素对于BODY标记的相对坐标
var objLeft = obj.offsetLeft;
var objTop = obj.offsetTop;
var objHeight = obj.offsetHeight;
var objWidth = obj.offsetWidth;
var objParent = obj.offsetParent;
while (objParent.tagName.toUpperCase() != "BODY"){
objLeft += objParent.offsetLeft;
objTop += objParent.offsetTop;
objParent = objParent.offsetParent;
}
//alert("控件左端:" + x + "select左端" + (objLeft + objWidth) + "控件底部:" + (y+h) + "select高:" + objTop);
var bolHide = true;
if( obj.style.display == "none" || obj.style.visibility == "hidden" || obj.getAttribute("Author") == "tiannet" ){
//如果标签本身就是隐藏的，则不需要再隐藏。如果是控件中的下拉框，也不用隐藏。
bolHide = false;
}
if( ( (objLeft + objWidth) > x && (y + h + 20) > objTop && (objTop+objHeight) > y && objLeft < (x+w) ) && bolHide ){
//arrTiannetHide.push(obj);//记录被隐藏的标签对象
arrTiannetHide[arrTiannetHide.length] = obj;
obj.style.visibility = "hidden";
}
}
}
//显示被隐藏的标签
function tiannetShowObject(){
for(var i = 0;i < arrTiannetHide.length;i ++){
//alert(arrTiannetHide[i]);
arrTiannetHide[i].style.visibility = "";
}
}
//初始化日期。
function tiannetInitDate(strDate){
var arr = strDate.split(tiannetDateSplit);
tiannetYear = arr[0];
tiannetMonth = arr[1];
tiannetDay = arr[2];
}
//清空
function tiannetClear(){
tiannetOutObject.value = "";
tiannetHideControl();
}
//任意点击时关闭该控件
function document.onclick(){
with(window.event.srcElement){
if (tagName != "INPUT" && getAttribute("Author") != "tiannet")
tiannetHideControl();
}
}
//按ESC键关闭该控件
function document.onkeypress(){
if( event.keyCode == 27 ){
tiannetHideControl();
}
}
Calendar.html:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title></title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="ProgId" content="VisualStudio.HTML">
<meta name="Originator" content="Microsoft Visual Studio .NET 7.1">
<script src="./Calendar.js"></script>
</head>
<body>
(1)只选择日期 <input type="text" name="date" readOnly onClick="setDay(this);"><br/>
(2)选择日期和小时 <input type="text" name="dateh" readOnly onClick="setDayH(this);"><br/>
(3)选择日期和小时及分钟 <input type="text" name="datehm" readOnly onClick="setDayHM(this);">
</body>
</html>
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