<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>JQuery实例 - 生成年月日</title>
<meta http-equiv="content-type" content="text/html; charset=gbk">
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(function () {
var $day = $("#day"),
$month = $("#month"),
$year = $("#year");
<!--初始化年-->
var dDate = new Date(),
dCurYear = dDate.getFullYear(),
str = "";
for (var i = dCurYear - 70; i < dCurYear + 70; i++) {
if (i == dCurYear) {
str = "<option value=" + i + " selected=true>" + i + "</option>";
} else {
str = "<option value=" + i + ">" + i + "</option>";
}
$year.append(str);
}
<!--初始化月-->
for (var i = 1; i <= 12; i++) {
if (i == (dDate.getMonth() + 1)) {
str = "<option value=" + i + " selected=true>" + i + "</option>";
} else {
str = "<option value=" + i + ">" + i + "</option>";
}
$month.append(str);
}
<!--调用函数出始化日-->
TUpdateCal($year.val(), $month.val());
$("#year,#month").bind("change", function(){
TUpdateCal($year.val(),$month.val());
});
});
<!--根据年月获取当月最大天数-->
function TGetDaysInMonth(iMonth, iYear) {
var dPrevDate = new Date(iYear, iMonth, 0);
return dPrevDate.getDate();
}
function TUpdateCal(iYear, iMonth) {
var dDate = new Date(),
daysInMonth = TGetDaysInMonth(iMonth, iYear),
str = "";
$("#day").empty();
for (var d = 1; d <= parseInt(daysInMonth); d++) {
if (d == dDate.getDate()) {
str = "<option value=" + d + " selected=true>" + d + "</option>";
} else {
str = "<option value=" + d + ">" + d + "</option>";
}
$("#day").append(str);
}
}
</script>
</head>
<body>
<form name="ymd">
<select id="year"></select>年
<select id="month"></select>月
<select id="day"></select>日
</form>
</body>
</html>原文：http://blog.csdn.net/xingjigongsi/article/details/42015071