自己用js写的日期控件

datepicker.js：

function HS_DateAdd(interval, number, date) {
number = parseInt(number);
if (typeof (date) == "string") {
var date = new Date(date.split("-")[0], date.split("-")[1], date
.split("-")[2])
}
if (typeof (date) == "object") {
var date = date
}
switch (interval) {
case "y":
return new Date(date.getFullYear() + number, date.getMonth(), date
.getDate());
break;
case "m":
return new Date(date.getFullYear(), date.getMonth() + number,
checkDate(date.getFullYear(), date.getMonth() + number, date
.getDate()));
break;
case "d":
return new Date(date.getFullYear(), date.getMonth(), date.getDate()
+ number);
break;
case "w":
return new Date(date.getFullYear(), date.getMonth(), 7 * number
+ date.getDate());
break;
}
}
function checkDate(year, month, date) {
var enddate = [ "31", "28", "31", "30", "31", "30", "31", "31", "30", "31",
"30", "31" ];
var returnDate = "";
if (year % 4 == 0) {
enddate[1] = "29"
}
if (date > enddate[month]) {
returnDate = enddate[month]
} else {
returnDate = date
}
return returnDate;
}

function WeekDay(date) {
var theDate;
if (typeof (date) == "string") {
theDate = new Date(date.split("-")[0], date.split("-")[1], date
.split("-")[2]);
}
if (typeof (date) == "object") {
theDate = date
}
return theDate.getDay();
}

function HS_calender() {

var lis = "";
var style = "";

/* http://www.codefans.net */

style += "<style type='text/css'>";
style += ".calender { width:170px; height:auto; font-size:12px; margin-right:14px; background:url(calenderbg.gif) no-repeat right center #fff; border:1px solid #397EAE; padding:1px}";
style += ".calender ul {list-style-type:none; margin:0; padding:0;}";
style += ".calender .day { background-color:#EDF5FF; height:20px;}";
style += ".calender .day li,.calender .date li{ float:left; width:14%; height:20px; line-height:20px; text-align:center}";
style += ".calender li a { text-decoration:none; font-family:Tahoma; font-size:11px; color:#333}";
style += ".calender li a:hover { color:#f30; text-decoration:underline}";
style += ".calender li a.hasArticle {font-weight:bold; color:#f60 !important}";
style += ".lastMonthDate, .nextMonthDate {color:#bbb;font-size:11px}";
style += ".selectThisYear a, .selectThisMonth a{text-decoration:none; margin:0 2px; color:#000; font-weight:bold}";
style += ".calender .LastMonth, .calender .NextMonth{ text-decoration:none; color:#000; font-size:18px; font-weight:bold; line-height:16px;}";
style += ".calender .LastMonth { float:left;}";
style += ".calender .NextMonth { float:right;}";
style += ".calenderBody {clear:both}";
style += ".calenderTitle {text-align:center;height:20px; line-height:20px; clear:both}";
style += ".today { background-color:#ffffaa;border:1px solid #f60; padding:2px}";
style += ".today a { color:#f30; }";
style += ".calenderBottom {clear:both; border-top:1px solid #ddd; padding: 3px 0; text-align:left}";
style += ".calenderBottom a {text-decoration:none; margin:2px !important; font-weight:bold; color:#000}";
style += ".calenderBottom a.closeCalender{float:right}";
style += ".closeCalenderBox {float:right; border:1px solid #000; background:#fff; font-size:9px; width:11px; height:11px; line-height:11px; text-align:center;overflow:hidden; font-weight:normal !important}";
style += "</style>";

var now;
if (typeof (arguments[0]) == "string") {
selectDate = arguments[0].split("-");
var year = selectDate[0];
var month = parseInt(selectDate[1]) - 1 + "";
var date = selectDate[2];
now = new Date(year, month, date);
} else if (typeof (arguments[0]) == "object") {
now = arguments[0];
}
var lastMonthEndDate = HS_DateAdd("d", "-1",
now.getFullYear() + "-" + now.getMonth() + "-01").getDate();
var lastMonthDate = WeekDay(now.getFullYear() + "-" + now.getMonth()
+ "-01");
var thisMonthLastDate = HS_DateAdd("d", "-1", now.getFullYear() + "-"
+ (parseInt(now.getMonth()) + 1).toString() + "-01");
var thisMonthEndDate = thisMonthLastDate.getDate();
var thisMonthEndDay = thisMonthLastDate.getDay();
var todayObj = new Date();
today = todayObj.getFullYear() + "-" + todayObj.getMonth() + "-"
+ todayObj.getDate();

for (i = 0; i < lastMonthDate; i++) { // Last Month's Date
lis = "<li class='lastMonthDate'>" + lastMonthEndDate + "</li>" + lis;
lastMonthEndDate--;
}
for (i = 1; i <= thisMonthEndDate; i++) { // Current Month's Date

if (today == now.getFullYear() + "-" + now.getMonth() + "-" + i) {
var todayString = now.getFullYear() + "-"
+ (parseInt(now.getMonth()) + 1).toString() + "-" + i;
lis += "<li><a href=javascript:void(0) class='today' onclick='_selectThisDay(this)' title='"
+ now.getFullYear()
+ "-"
+ (parseInt(now.getMonth()) + 1)
+ "-" + i + "'>" + i + "</a></li>";
} else {
lis += "<li><a href=javascript:void(0) onclick='_selectThisDay(this)' title='"
+ now.getFullYear()
+ "-"
+ (parseInt(now.getMonth()) + 1)
+ "-" + i + "'>" + i + "</a></li>";
}

}
var j = 1;
for (i = thisMonthEndDay; i < 6; i++) { // Next Month's Date
lis += "<li class='nextMonthDate'>" + j + "</li>";
j++;
}
lis += style;

var CalenderTitle = "<a href='javascript:void(0)' class='NextMonth' onclick=HS_calender(HS_DateAdd('m',1,'"
+ now.getFullYear()
+ "-"
+ now.getMonth()
+ "-"
+ now.getDate()
+ "'),this) title='Next Month'>»</a>";
CalenderTitle += "<a href='javascript:void(0)' class='LastMonth' onclick=HS_calender(HS_DateAdd('m',-1,'"
+ now.getFullYear()
+ "-"
+ now.getMonth()
+ "-"
+ now.getDate()
+ "'),this) title='Previous Month'>«</a>";
CalenderTitle += "<span class='selectThisYear'><a href='javascript:void(0)' onclick='CalenderselectYear(this)' title='Click here to select other year' >"
+ now.getFullYear()
+ "</a></span>年<span class='selectThisMonth'><a href='javascript:void(0)' onclick='CalenderselectMonth(this)' title='Click here to select other month'>"
+ (parseInt(now.getMonth()) + 1).toString() + "</a></span>月";

if (arguments.length > 1) {
arguments[1].parentNode.parentNode.getElementsByTagName("ul")[1].innerHTML = lis;
arguments[1].parentNode.innerHTML = CalenderTitle;

} else {

var CalenderBox = style
// ↓2010.10.26バグ対応（日期コントロール） CIJ対応
+ "<div class='calender' id='calender'><div class='calenderTitle'>"
// ↑2010.10.26バグ対応（日期コントロール） CIJ対応
+ CalenderTitle
+ "</div><div class='calenderBody'><ul class='day'><li>日</li><li>月</li><li>火</li><li>水</li><li>木</li><li>金</li><li>土</li></ul><ul class='date' id='thisMonthDate'>"
+ lis
+ "</ul></div><div class='calenderBottom'><a href='javascript:void(0)' class='closeCalender' onclick='closeCalender(this)'>×</a><span><span><a href=javascript:void(0) onclick='_selectThisDay(this)' title='"
+ todayString + "'>Today</a></span></span></div><iframe src='javascript:false' style='position:absolute; visibility:inherit; top:0px; left:0px; width:170px; height:auto; z-index:-1;filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)';'></iframe></div>";
return CalenderBox;
}
}
function _selectThisDay(d) {
var boxObj = d.parentNode.parentNode.parentNode.parentNode.parentNode;

var tmpResult

if (d.title.split("-")[1].length < 2) {
tmpResult = "/" + "0" + d.title.split("-")[1];
} else {
tmpResult = "/" + d.title.split("-")[1];
}

if (d.title.split("-")[2].length < 2) {
tmpResult += "/" + "0" + d.title.split("-")[2];
} else {
tmpResult += "/" + d.title.split("-")[2];
}

boxObj.targetObj.value = d.title.split("-")[0] + tmpResult ;
boxObj.parentNode.removeChild(boxObj);
}
function closeCalender(d) {
var boxObj = d.parentNode.parentNode.parentNode;
boxObj.parentNode.removeChild(boxObj);
}

function CalenderselectYear(obj) {
var opt = "";
var thisYear = obj.innerHTML;
for (i = 1970; i <= 2020; i++) {
if (i == thisYear) {
opt += "<option value=" + i + " selected>" + i + "</option>";
} else {
opt += "<option value=" + i + ">" + i + "</option>";
}
}
opt = "<select onblur='selectThisYear(this)' onchange='selectThisYear(this)' style='font-size:11px'>"
+ opt + "</select>";
obj.parentNode.innerHTML = opt;
}

function selectThisYear(obj) {
HS_calender(obj.value
+ "-"
+ obj.parentNode.parentNode.getElementsByTagName("span")[1]
.getElementsByTagName("a")[0].innerHTML + "-1",
obj.parentNode);
}

function CalenderselectMonth(obj) {
var opt = "";
var thisMonth = obj.innerHTML;
for (i = 1; i <= 12; i++) {
if (i == thisMonth) {
opt += "<option value=" + i + " selected>" + i + "</option>";
} else {
opt += "<option value=" + i + ">" + i + "</option>";
}
}
opt = "<select onblur='selectThisMonth(this)' onchange='selectThisMonth(this)' style='font-size:11px'>"
+ opt + "</select>";
obj.parentNode.innerHTML = opt;
}

function selectThisMonth(obj) {
HS_calender(obj.parentNode.parentNode.getElementsByTagName("span")[0]
.getElementsByTagName("a")[0].innerHTML
+ "-" + obj.value + "-1", obj.parentNode);
}

function HS_setDate(inputObj) {
// ↓2010.10.26バグ対応（日期コントロール） CIJ対応
var oldObj = document.getElementById("calender");
if(oldObj != null) {
var boxObj = oldObj.parentNode;
boxObj.parentNode.removeChild(boxObj);
}
// ↑2010.10.26バグ対応（日期コントロール） CIJ対応
var calenderObj = document.createElement("span");
calenderObj.innerHTML = HS_calender(new Date());
calenderObj.style.position = "absolute";
calenderObj.targetObj = inputObj;
inputObj.parentNode.insertBefore(calenderObj, inputObj.nextSibling);

return false;
}

function HS_setDateGds0101(inputObj,argleft,argtop) {
var calenderObj = document.createElement("span");
calenderObj.innerHTML = HS_calender(new Date());
calenderObj.style.position = "absolute";
calenderObj.style.left = argleft;
calenderObj.style.top = argtop;
calenderObj.targetObj = inputObj;
inputObj.parentNode.insertBefore(calenderObj, inputObj.nextSibling);

return false;
}

调用方法：在jsp中添加如下代码：
<s:textfield name="etbFrom" id= "txtEtbFrom" cssClass="in-ship" theme="simple" />
<s:submit type="image" onclick="return HS_setDate(etbFrom);" src="D:/EclipseWorkSpace/newportal1/WebContent/jsp/img/calendarpicture.jpg" id="btnEtbFrom" cssStyle="width:17px;height:17px;" theme="simple"/>
注意要在<body>下面加上<script type="text/javascript" src="../js/datepicker.js"></script>