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类型:
Full Script |
类别:
HTML Manipulation
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许可证:
GNU General Public License |
语言:
JavaScript
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描述:
日期选择下拉菜单，会根据月份不同选择相应的当月天数
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该代码片段的版本系列:
| 片段ID |
下载版本 |
提交时间 |
提交人 |
删除 |
| 4685 | 1.0 | 2003-10-14 14:40 | cbd001 |  |
点击"下载版本"来下载该代码片段.
最新版本的代码片段: 1.0
脚本说明:
第一步：把如下代码加入<body>区域中
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
//set todays date
Now = new Date();
NowDay = Now.getDate();
NowMonth = Now.getMonth();
NowYear = Now.getYear();
if (NowYear < 2000) NowYear += 1900; //for Netscape
//function for returning how many days there are in a month including leap years
function DaysInMonth(WhichMonth, WhichYear)
{
var DaysInMonth = 31;
if (WhichMonth == "Apr" || WhichMonth == "Jun" || WhichMonth == "Sep" || WhichMonth == "Nov") DaysInMonth = 30;
if (WhichMonth == "Feb" && (WhichYear/4) != Math.floor(WhichYear/4)) DaysInMonth = 28;
if (WhichMonth == "Feb" && (WhichYear/4) == Math.floor(WhichYear/4)) DaysInMonth = 29;
return DaysInMonth;
}
//function to change the available days in a months
function ChangeOptionDays(Which)
{
DaysObject = eval("document.Form1." + Which + "Day");
MonthObject = eval("document.Form1." + Which + "Month");
YearObject = eval("document.Form1." + Which + "Year");
Month = MonthObject[MonthObject.selectedIndex].text;
Year = YearObject[YearObject.selectedIndex].text;
DaysForThisSelection = DaysInMonth(Month, Year);
CurrentDaysInSelection = DaysObject.length;
if (CurrentDaysInSelection > DaysForThisSelection)
{
for (i=0; i<(CurrentDaysInSelection-DaysForThisSelection); i++)
{
DaysObject.options[DaysObject.options.length - 1] = null
}
}
if (DaysForThisSelection > CurrentDaysInSelection)
{
for (i=0; i<(DaysForThisSelection-CurrentDaysInSelection); i++)
{
NewOption = new Option(DaysObject.options.length + 1);
DaysObject.add(NewOption);
}
}
if (DaysObject.selectedIndex < 0) DaysObject.selectedIndex == 0;
}
//function to set options to today
function SetToToday(Which)
{
DaysObject = eval("document.Form1." + Which + "Day");
MonthObject = eval("document.Form1." + Which + "Month");
YearObject = eval("document.Form1." + Which + "Year");
YearObject[0].selected = true;
MonthObject[NowMonth].selected = true;
ChangeOptionDays(Which);
DaysObject[NowDay-1].selected = true;
}
//function to write option years plus x
function WriteYearOptions(YearsAhead)
{
line = "";
for (i=0; i<YearsAhead; i++)
{
line += "<OPTION>";
line += NowYear + i;
}
return line;
}
// End -->
</script>
<FORM name="Form1">
<SELECT name="FirstSelectDay">
<OPTION>1
<OPTION>2
<OPTION>3
<OPTION>4
<OPTION>5
<OPTION>6
<OPTION>7
<OPTION>8
<OPTION>9
<OPTION>10
<OPTION>11
<OPTION>12
<OPTION>13
<OPTION>14
<OPTION>15
<OPTION>16
<OPTION>17
<OPTION>18
<OPTION>19
<OPTION>20
<OPTION>21
<OPTION>22
<OPTION>23
<OPTION>24
<OPTION>25
<OPTION>26
<OPTION>27
<OPTION>28
<OPTION>29
<OPTION>30
<OPTION>31
</SELECT>
<SELECT name="FirstSelectMonth" onchange="ChangeOptionDays('FirstSelect')">
<OPTION>Jan
<OPTION>Feb
<OPTION>Mar
<OPTION>Apr
<OPTION>May
<OPTION>Jun
<OPTION>Jul
<OPTION>Aug
<OPTION>Sep
<OPTION>Oct
<OPTION>Nov
<OPTION>Dec
</SELECT>
<SELECT name="FirstSelectYear" onchange="ChangeOptionDays('FirstSelect')">
<SCRIPT language="JavaScript">
document.write(WriteYearOptions(50));
</SCRIPT>
</SELECT>
</FORM>
第二步：请把<body>中的内容改为：
<body bgcolor="#fef4d9" onLoad="SetToToday('FirstSelect');">
如果您修改了一个代码片段并且觉得很应该让别人共享,您可以把这作为这个代码片段的最新版本提交上来. |
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