<html>
<head>
<title> 年月日三下拉框联动 </title>
<script src="jquery-1.7.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
(function ($) {
$.extend($.fn, {
sjSelect: function (options) {
// 默认参数
var settings = {
s_year: 1950,
e_year: 2020,
index: null,
cssClass: "lSelect" // 下拉框css名称
};
$.extend(settings, options);
return this.each(function () {
var $this = $(this);
var MonHead = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
var _selstr = "";
var _selArr;
if (typeof ($this.attr("sel")) != "undefined") {
_selstr = $this.attr("sel");
_selArr = _selstr.split(',');
$this.val(_selstr);
}
var _rIndex = settings.index == null ? "" + Math.round(Math.random() * 1000000) : settings.index;
var _allstr = "<select class='" + settings.cssClass + " year" + _rIndex
+ "'><option vlaue=''>请选择年份</option>";
for (var i = settings.s_year; i < settings.e_year; i++) {
_allstr += "<option vlaue='" + i + "'";
if (_selstr.length > 0) {
if (i == _selArr[0]) {
_allstr += " selected";
}
}
_allstr += ">" + i + "年</option>";
}
_allstr += "</select>";
_allstr += "<select class='" + settings.cssClass + " month" + _rIndex
+ "'><option vlaue=''>请选择月份</option>";
for (var k = 1; k <= 12; k++) {
_allstr += "<option vlaue='" + k + "'";
if (_selstr.length > 0) {
if (k == _selArr[1]) {
_allstr += " selected";
}
}
_allstr += ">" + k + "月</option>";
}
_allstr += "</select>";
var n = 0;
if (_selstr.length > 0) {
n = MonHead[_selArr[1] - 1];
if (_selArr[1] == 2 && IsPinYear(_selArr[0])) {
n++;
}
} else {
var _cTime = new Date();
var _cMonth = _cTime.getMonth();
var _cYear = _cTime.getYear();
n = MonHead[_cMonth];
if (_cMonth == 1 && IsPinYear(_cYear)) {
n++;
}
}
_allstr += "<select class='" + settings.cssClass + " day" + _rIndex
+ "'><option vlaue=''>请选择日</option>";
for (var h = 1; h <= n; h++) {
_allstr += "<option vlaue='" + h + "'";
if (_selstr.length > 0) {
if (h == _selArr[2]) {
_allstr += " selected";
}
}
_allstr += ">" + h + "日</option>";
}
_allstr += "</select>";
$this.after(_allstr);
function IsPinYear(year) {//判断是否闰平年
return (0 == year % 4 && (year % 100 != 0 || year % 400 == 0));
}
function writeDay(n) { //据条件写日期的下拉框
var _daystr = "<option vlaue=''>请选择日</option>";
for (var i = 1; i <= n; i++) {
_daystr += "<option vlaue='" + i + "'>" + i + "日</option>";
}
$(".day" + _rIndex).html(_daystr);
}
function getJlSelVal() {
var _year_val = $(".year" + _rIndex).val();
var _month_val = $(".month" + _rIndex).val();
var _day_val = $(".day" + _rIndex).val();
if (_year_val == "请选择年份" || _month_val == "请选择月份" || _day_val == "请选择日") {
$this.val("");
} else {
var _lastval = _year_val.substring(0, _year_val.length - 1)
+ "," + _month_val.substring(0, _month_val.length - 1)
+ "," + _day_val.substring(0, _day_val.length - 1);
$this.val(_lastval);
}
}
$(".day" + _rIndex).change(function () {
getJlSelVal();
});
$(".year" + _rIndex).change(function () {//年发生变化时日期发生变化(主要是判断闰平年)
var MMvalue = $(".month" + _rIndex).val();
if (MMvalue == "请选择月份") {
$(".day" + _rIndex).html("<option value=''>请选择日</option>");
return;
}
var n = MonHead[MMvalue.substring(0, MMvalue.length - 1) - 1];
var YYval = $(".year" + _rIndex).val();
if (MMvalue.substring(0, MMvalue.length - 1) == 2 && IsPinYear(YYval.substring(0, YYval.length - 1))) {
n++;
}
writeDay(n);
getJlSelVal();
});
$(".month" + _rIndex).change(function () {//月发生变化时日期联动
var YYYYvalue = $(".year" + _rIndex).val();
if (YYYYvalue == "请选择年份") {
$(".day" + _rIndex).html("<option value=''>请选择日</option>");
return;
}
var MMvalue = $(".month" + _rIndex).val();
var _cmon = MMvalue.substring(0, MMvalue.length - 1);
var n = MonHead[_cmon - 1];
if (_cmon == 2 && IsPinYear(YYYYvalue.substring(0, YYYYvalue.length - 1)))
n++;
writeDay(n);
getJlSelVal();
});
});
}
});
})(jQuery);
$(function () {
$(".gg").sjSelect();
$("#dd").click(function () {
$(".gg").each(function () {
alert($(this).val());
});
});
});
</script>
</head>
<body>
<input type="hidden" class="gg" sel="1989,10,1" />
<input type="hidden" class="gg" sel="2008,2,29" />
<input type="button" id="dd" />
</body>
</html>
