js日期控件（纯手写）

/* onclick="SetDate(this,'yyyy-MM-dd')" */


var cal;
var isFocus = false; // 是否为焦点
function SetDate(obj, strFormat) 
{

var date = new Date();
var by = date.getFullYear() - 50; // 最小值 → 50年前
var ey = date.getFullYear() + 50; // 最大值 → 20年后
// 初始化为中文版，1为英文版
cal = (cal == null) ? new Calendar(by, ey, 0, strFormat)
: (cal.dateFormatStyle == strFormat ? cal : new Calendar(by, ey, 0,
strFormat));
cal.show(obj);
}
/**//* 返回日期 */
String.prototype.toDate = function(style) {
var y = this.substring(style.indexOf('y'), style.lastIndexOf('y') + 1);// 年
var m = this.substring(style.indexOf('M'), style.lastIndexOf('M') + 1);// 月
var d = this.substring(style.indexOf('d'), style.lastIndexOf('d') + 1);// 日
var h = this.substring(style.indexOf('h'), style.lastIndexOf('h') + 1);// 时
var i = this.substring(style.indexOf('m'), style.lastIndexOf('m') + 1);// 分
var s = this.substring(style.indexOf('s'), style.lastIndexOf('s') + 1);// 秒
if (isNaN(y))
y = new Date().getFullYear();
if (isNaN(m))
m = new Date().getMonth();
if (isNaN(d))
d = new Date().getDate();
if (isNaN(h))
h = new Date().getHours();
if (isNaN(i))
i = new Date().getMinutes();
if (isNaN(s))
s = new Date().getSeconds();
var dt;
eval("dt = new Date('" + y + "', '" + (m - 1) + "','" + d + "','" + h
+ "','" + i + "','" + s + "')");
return dt;
}
/**//* 格式化日期 */
Date.prototype.format = function(style) {
var o = {
"M+" : this.getMonth() + 1, // month
"d+" : this.getDate(), // day
"h+" : this.getHours(), // hour
"m+" : this.getMinutes(), // minute
"s+" : this.getSeconds(), // second
"w+" : "天一二三四五六".charAt(this.getDay()), // week
"q+" : Math.floor((this.getMonth() + 3) / 3), // quarter
"S" : this.getMilliseconds()
// millisecond
}
if (/(y+)/.test(style)) {
style = style.replace(RegExp.$1, (this.getFullYear() + "")
.substr(4 - RegExp.$1.length));
}
for ( var k in o) {
if (new RegExp("(" + k + ")").test(style)) {
style = style.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k]
: ("00" + o[k]).substr(("" + o[k]).length));
}
}
return style;
};

/**//*
* 日历类 @param beginYear 1990 @param endYear 2010 @param lang 0(中文)|1(英语)
* 可自由扩充 @param dateFormatStyle "yyyy-MM-dd";
*/
function Calendar(beginYear, endYear, lang, dateFormatStyle) {
this.beginYear = 1990;
this.endYear = 2010;
this.lang = 0; // 0(中文) | 1(英文)
this.dateFormatStyle = "yyyy-MM-dd";

if (beginYear != null && endYear != null) {
this.beginYear = beginYear;
this.endYear = endYear;
}
if (lang != null) {
this.lang = lang
}

if (dateFormatStyle != null) {
this.dateFormatStyle = dateFormatStyle
}

this.dateControl = null;
this.panel = this.getElementById("calendarPanel");
this.container = this.getElementById("ContainerPanel");
this.form = null;

this.date = new Date();
this.year = this.date.getFullYear();
this.month = this.date.getMonth();

this.colors = {
"cur_word" : "#FFFFFF", // 当日日期文字颜色
"cur_bg" : "#83A6F4", // 当日日期单元格背影色
"sel_bg" : "#FFCCCC", // 已被选择的日期单元格背影色
"sun_word" : "#FF0000", // 星期天文字颜色
"sat_word" : "#0000FF", // 星期六文字颜色
"td_word_light" : "#333333", // 单元格文字颜色
"td_word_dark" : "#CCCCCC", // 单元格文字暗色
"td_bg_out" : "#EFEFEF", // 单元格背影色
"td_bg_over" : "#FFCC00", // 单元格背影色
"tr_word" : "#FFFFFF", // 日历头文字颜色
"tr_bg" : "#666666", // 日历头背影色
"input_border" : "#CCCCCC", // input控件的边框颜色
"input_bg" : "#EFEFEF" // input控件的背影色
}

this.draw();
this.bindYear();
this.bindMonth();
this.changeSelect();
this.bindData();
}

/**//*
* 日历类属性（语言包，可自由扩展）
*/
Calendar.language = {
"year" : [ [ "" ], [ "" ] ],
"months" : [
[ "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月",
"十一月", "十二月" ],
[ "JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP",
"OCT", "NOV", "DEC" ] ],
"weeks" : [ [ "日", "一", "二", "三", "四", "五", "六" ],
[ "SUN", "MON", "TUR", "WED", "THU", "FRI", "SAT" ] ],
"abort" : [ [ "时间" ], [ "TIME" ] ],
"clear" : [ [ "清空" ], [ "CLS" ] ],
"today" : [ [ "今天" ], [ "TODAY" ] ],
"close" : [ [ "关闭" ], [ "CLOSE" ] ]
}

Calendar.prototype.draw = function() {
calendar = this;

var mvAry = [];
mvAry[mvAry.length] = ' <div name="calendarForm" style="margin: 0px;">';
mvAry[mvAry.length] = ' <table width="100%" border="0" cellpadding="0" cellspacing="1">';
mvAry[mvAry.length] = ' <tr>';
mvAry[mvAry.length] = ' <th align="left" width="1%"><input style="border: 1px solid '
+ calendar.colors["input_border"]
+ ';background-color:'
+ calendar.colors["input_bg"]
+ ';16px;height:20px;" name="prevMonth" type="button" id="prevMonth" value="<" /></th>';
mvAry[mvAry.length] = ' <th align="center" width="98%" nowrap="nowrap"><select name="calendarYear" id="calendarYear" style="font-size:12px;"></select><select name="calendarMonth" id="calendarMonth" style="font-size:12px;"></select></th>';
mvAry[mvAry.length] = ' <th align="right" width="1%"><input style="border: 1px solid '
+ calendar.colors["input_border"]
+ ';background-color:'
+ calendar.colors["input_bg"]
+ ';16px;height:20px;" name="nextMonth" type="button" id="nextMonth" value=">" /></th>';
mvAry[mvAry.length] = ' </tr>';
mvAry[mvAry.length] = ' </table>';
mvAry[mvAry.length] = ' <table id="calendarTable" width="100%" style="border:0px solid #CCCCCC;background-color:#FFFFFF" border="0" cellpadding="3" cellspacing="1">';
mvAry[mvAry.length] = ' <tr>';
for ( var i = 0; i < 7; i++) {
mvAry[mvAry.length] = ' <th style="font-weight:normal;background-color:'
+ calendar.colors["tr_bg"]
+ ';color:'
+ calendar.colors["tr_word"]
+ ';">'
+ Calendar.language["weeks"][this.lang][i] + '</th>';
}
mvAry[mvAry.length] = ' </tr>';
for ( var i = 0; i < 6; i++) {
mvAry[mvAry.length] = ' <tr align="center">';
for ( var j = 0; j < 7; j++) {
if (j == 0) {
mvAry[mvAry.length] = ' <td style="cursor:default;color:' + calendar.colors["sun_word"] + ';"></td>';
} else if (j == 6) {
mvAry[mvAry.length] = ' <td style="cursor:default;color:' + calendar.colors["sat_word"] + ';"></td>';
} else {
mvAry[mvAry.length] = ' <td style="cursor:default;"></td>';
}
}
mvAry[mvAry.length] = ' </tr>';
}

mvAry[mvAry.length] = ' <tr align="center" style="font-size:12px;">';
mvAry[mvAry.length] = ' <td name="abort" id="abort" colspan="1" style="cursor:default;">' + Calendar.language["abort"][this.lang] + '</td>';
mvAry[mvAry.length] = ' <td colspan="6"><select name="calendarHour" id="calendarHour"></select>';
mvAry[mvAry.length] = ':<select name="calendarMinute" id="calendarMinute"></select>';
mvAry[mvAry.length] = ':<select name="calendarSecond" id="calendarSecond"></select>';
mvAry[mvAry.length] = ' </td></tr>';

mvAry[mvAry.length] = ' <tr style="background-color:' + calendar.colors["input_bg"] + ';">';
mvAry[mvAry.length] = ' <th colspan="2"><input name="calendarClear" type="button" id="calendarClear" value="'
+ Calendar.language["clear"][this.lang]
+ '" style="border: 1px solid '
+ calendar.colors["input_border"]
+ ';background-color:'
+ calendar.colors["input_bg"]
+ ';100%;height:20px;font-size:12px;"/></th>';
mvAry[mvAry.length] = ' <th colspan="3"><input name="calendarToday" type="button" id="calendarToday" value="'
+ Calendar.language["today"][this.lang]
+ '" style="border: 1px solid '
+ calendar.colors["input_border"]
+ ';background-color:'
+ calendar.colors["input_bg"]
+ ';100%;height:20px;font-size:12px;"/></th>';
mvAry[mvAry.length] = ' <th colspan="2"><input name="calendarClose" type="button" id="calendarClose" value="'
+ Calendar.language["close"][this.lang]
+ '" style="border: 1px solid '
+ calendar.colors["input_border"]
+ ';background-color:'
+ calendar.colors["input_bg"]
+ ';100%;height:20px;font-size:12px;"/></th>';
mvAry[mvAry.length] = ' </tr>';
mvAry[mvAry.length] = ' </table>';
mvAry[mvAry.length] = ' </div>';
this.panel.innerHTML = mvAry.join("");

var obj = this.getElementById("prevMonth");
obj.onclick = function() {
calendar.goPrevMonth(calendar);
}
obj.onblur = function() {
calendar.onblur();
}
this.prevMonth = obj;

obj = this.getElementById("nextMonth");
obj.onclick = function() {
calendar.goNextMonth(calendar);
}
obj.onblur = function() {
calendar.onblur();
}
this.nextMonth = obj;

obj = this.getElementById("calendarClear");
obj.onclick = function() {
calendar.dateControl.value = "";
calendar.hide();
}
this.calendarClear = obj;

obj = this.getElementById("calendarClose");
obj.onclick = function() {
calendar.hide();
}
this.calendarClose = obj;

obj = this.getElementById("calendarYear");
obj.onchange = function() {
calendar.update(calendar);
}
obj.onblur = function() {
calendar.onblur();
}
this.calendarYear = obj;

obj = this.getElementById("calendarMonth");
with (obj) {
onchange = function() {
calendar.update(calendar);
}
onblur = function() {
calendar.onblur();
}
}
this.calendarMonth = obj;

obj = this.getElementById("calendarHour");
with (obj) {
length = 0;
for ( var i = 0; i < 24; i++) {
if (i < 10) {
options[length] = new Option("0" + i, "0" + i);
} else {
options[length] = new Option(i, i);
}
}
}
this.calendarHour = obj;

obj = this.getElementById("calendarMinute");
with (obj) {
length = 0;
for ( var i = 0; i < 60; i++) {
if (i < 10) {
options[length] = new Option("0" + i, "0" + i);
} else {
options[length] = new Option(i, i);
}
}
}
this.calendarMinute = obj;

obj = this.getElementById("calendarSecond");
with (obj) {
length = 0;
for ( var i = 0; i < 60; i++) {
if (i < 10) {
options[length] = new Option("0" + i, "0" + i);
} else {
options[length] = new Option(i, i);
}
}
}
this.calendarSecond = obj;

obj = this.getElementById("calendarToday");
obj.onclick = function() {
var today = new Date();
calendar.date = today;
calendar.year = today.getFullYear();
calendar.month = today.getMonth();
calendar.changeSelect();
calendar.bindData();
calendar.dateControl.value = today.format(calendar.dateFormatStyle);
calendar.hide();
}
this.calendarToday = obj;
}

// 年份下拉框绑定数据
Calendar.prototype.bindYear = function() {
var cy = this.calendarYear;
cy.length = 0;
for ( var i = this.beginYear; i <= this.endYear; i++) {
cy.options[cy.length] = new Option(i
+ Calendar.language["year"][this.lang], i);
}
}

// 月份下拉框绑定数据
Calendar.prototype.bindMonth = function() {
var cm = this.calendarMonth;
cm.length = 0;
for ( var i = 0; i < 12; i++) {
cm.options[cm.length] = new Option(
Calendar.language["months"][this.lang][i], i);
}
}

// 获取小时的数据
Calendar.prototype.getHour = function() {
return this.calendarHour.options[this.calendarHour.selectedIndex].value;
}

// 获取分钟的数据
Calendar.prototype.getMinute = function() {
return this.calendarMinute.options[this.calendarMinute.selectedIndex].value;
}

// 获取秒的数据
Calendar.prototype.getSecond = function() {
return this.calendarSecond.options[this.calendarSecond.selectedIndex].value;
}

// 向前一月
Calendar.prototype.goPrevMonth = function(e) {
if (this.year == this.beginYear && this.month == 0) {
return;
}
this.month--;
if (this.month == -1) {
this.year--;
this.month = 11;
}
this.date = new Date(this.year, this.month, 1, this.getHour(), this
.getMinute(), this.getSecond());
this.changeSelect();
this.bindData();
}

// 向后一月
Calendar.prototype.goNextMonth = function(e) {
if (this.year == this.endYear && this.month == 11) {
return;
}
this.month++;
if (this.month == 12) {
this.year++;
this.month = 0;
}
this.date = new Date(this.year, this.month, 1, this.getHour(), this
.getMinute(), this.getSecond());
this.changeSelect();
this.bindData();
}

// 改变SELECT选中状态
Calendar.prototype.changeSelect = function() {
var cy = this.calendarYear;
var cm = this.calendarMonth;
var ch = this.calendarHour;
var ci = this.calendarMinute;
var cs = this.calendarSecond;
for ( var i = 0; i < cy.length; i++) {
if (cy.options[i].value == this.date.getFullYear()) {
cy[i].selected = true;
break;
}
}
for ( var i = 0; i < cm.length; i++) {
if (cm.options[i].value == this.date.getMonth()) {
cm[i].selected = true;
break;
}
}
for ( var i = 0; i < ch.length; i++) {
if (ch.options[i].value == this.date.getHours()) {
ch[i].selected = true;
break;
}
}
for ( var i = 0; i < ci.length; i++) {
if (ci.options[i].value == this.date.getMinutes()) {
ci[i].selected = true;
break;
}
}
for ( var i = 0; i < cs.length; i++) {
if (cs.options[i].value == this.date.getSeconds()) {
cs[i].selected = true;
break;
}
}
}

// 更新年、月
Calendar.prototype.update = function(e) {
this.year = e.calendarYear.options[e.calendarYear.selectedIndex].value;
this.month = e.calendarMonth.options[e.calendarMonth.selectedIndex].value;
this.date = new Date(this.year, this.month, 1, this.getHour(), this
.getMinute(), this.getSecond());
this.changeSelect();
this.bindData();
}

// 绑定数据到月视图
Calendar.prototype.bindData = function() {
var calendar = this;
var dateArray = this.getMonthViewArray(this.date.getFullYear(), this.date
.getMonth());
var tds = this.getElementById("calendarTable").getElementsByTagName("td");
for ( var i = 0; i < tds.length; i++) {
tds[i].style.backgroundColor = calendar.colors["td_bg_out"];
tds[i].onclick = function() {
return;
}
tds[i].onmouseover = function() {
return;
}
tds[i].onmouseout = function() {
return;
}
if (i > dateArray.length - 1)
break;
tds[i].innerHTML = dateArray[i];
if (dateArray[i] != " ") {
tds[i].onclick = function() {
if (calendar.dateControl != null) {
calendar.dateControl.value = new Date(calendar.date
.getFullYear(), calendar.date.getMonth(),
this.innerHTML, calendar.getHour(), calendar
.getMinute(), calendar.getSecond())
.format(calendar.dateFormatStyle);
}
calendar.hide();
}
tds[i].onmouseover = function() {
this.style.backgroundColor = calendar.colors["td_bg_over"];
}
tds[i].onmouseout = function() {
this.style.backgroundColor = calendar.colors["td_bg_out"];
}
if (new Date().format("yyyy-MM-dd") == new Date(calendar.date
.getFullYear(), calendar.date.getMonth(), dateArray[i])
.format("yyyy-MM-dd")) {
tds[i].style.backgroundColor = calendar.colors["cur_bg"];
tds[i].onmouseover = function() {
this.style.backgroundColor = calendar.colors["td_bg_over"];
}
tds[i].onmouseout = function() {
this.style.backgroundColor = calendar.colors["cur_bg"];
}
}// end if

// 设置已被选择的日期单元格背影色
if (calendar.dateControl != null
&& calendar.dateControl.value == new Date(calendar.date
.getFullYear(), calendar.date.getMonth(),
dateArray[i], calendar.getHour(), calendar
.getMinute(), calendar.getSecond())
.format(calendar.dateFormatStyle)) {
tds[i].style.backgroundColor = calendar.colors["sel_bg"];
tds[i].onmouseover = function() {
this.style.backgroundColor = calendar.colors["td_bg_over"];
}
tds[i].onmouseout = function() {
this.style.backgroundColor = calendar.colors["sel_bg"];
}
}
}
}
}

// 根据年、月得到月视图数据(数组形式)
Calendar.prototype.getMonthViewArray = function(y, m) {
var mvArray = [];
var dayOfFirstDay = new Date(y, m, 1).getDay();
var daysOfMonth = new Date(y, m + 1, 0).getDate();
for ( var i = 0; i < 42; i++) {
mvArray[i] = " ";
}
for ( var i = 0; i < daysOfMonth; i++) {
mvArray[i + dayOfFirstDay] = i + 1;
}
return mvArray;
}

// 扩展 document.getElementById(id) 多浏览器兼容性 from meizz tree source
Calendar.prototype.getElementById = function(id) {
if (typeof (id) != "string" || id == "")
return null;
if (document.getElementById)
return document.getElementById(id);
if (document.all)
return document.all(id);
try {
return eval(id);
} catch (e) {
return null;
}
}

// 扩展 object.getElementsByTagName(tagName)
Calendar.prototype.getElementsByTagName = function(object, tagName) {
if (document.getElementsByTagName)
return document.getElementsByTagName(tagName);
if (document.all)
return document.all.tags(tagName);
}

// 取得HTML控件绝对位置
Calendar.prototype.getAbsPoint = function(e) {
var x = e.offsetLeft;
var y = e.offsetTop;
while (e = e.offsetParent) {
x += e.offsetLeft;
y += e.offsetTop;
}
return {
"x" : x,
"y" : y
};
}

// 显示日历
Calendar.prototype.show = function(dateObj, popControl) {
if (dateObj == null) {
throw new Error("arguments[0] is necessary")
}
this.dateControl = dateObj;

this.date = (dateObj.value.length > 0) ? new Date(dateObj.value
.toDate(this.dateFormatStyle)) : new Date();// 若为空则显示当前月份
this.year = this.date.getFullYear();
this.month = this.date.getMonth();
this.changeSelect();
this.bindData();
if (popControl == null) {
popControl = dateObj;
}
var xy = this.getAbsPoint(popControl);
this.panel.style.left = xy.x - 25 + "px";
this.panel.style.top = (xy.y + dateObj.offsetHeight) + "px";

this.panel.style.display = "";
this.container.style.display = "";

dateObj.onblur = function() {
calendar.onblur();
}
this.container.onmouseover = function() {
isFocus = true;
}
this.container.onmouseout = function() {
isFocus = false;
}
}

// 隐藏日历
Calendar.prototype.hide = function() {
this.panel.style.display = "none";
this.container.style.display = "none";
isFocus = false;
}

// 焦点转移时隐藏日历
Calendar.prototype.onblur = function() {
if (!isFocus) {
this.hide();
}
}
document
.write('<div id="ContainerPanel" style="display:none;"><div id="calendarPanel" style="position: absolute;display: none;z-index: 9999;');
document
.write('background-color: #FFFFFF;border: 1px solid #CCCCCC;175px;font-size:12px;margin-left:25px;"></div>');
/**if (document.all) {
document
.write('<iframe style="position:absolute;z-index:2000;expression(this.previousSibling.offsetWidth);');
document.write('height:expression(this.previousSibling.offsetHeight);');
document
.write('left:expression(this.previousSibling.offsetLeft);top:expression(this.previousSibling.offsetTop);');
document
.write('display:expression(this.previousSibling.style.display);" scrolling="no" frameborder="no"></iframe>');
}*/
document.write('</div>');

 使用方法：复制上面的代码生成JS文件，页面引入后，添加onclick="SetDate(this,'yyyy-MM-dd')属性即可使用；