发布于 2017-04-27 00:13:54 | 108 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Javascript教程，程序狗速度看过来！

JavaScript客户端脚本语言

Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。

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使用Asp.net+Javascript控制的日期控件，需要的朋友可以参考下。

控件效果如下：

从左到右：month，day，year

.cs文件初始化这三个下拉列表

 
private void BindBirthDay(int day, int month, int year) 
{ 
int dayNow = day; 
int monNow = month; 
int yearNow = year; 
//binding Month 
for (int i = 1; i <= 12; i++) 
{ 
ddlBirMon.Items.Add(new ListItem(i.ToString(), i.ToString())); 
} 
ddlBirMon.Items[monNow - 1].Selected = true; 
//binding Day 
int daysOfMonth = DateTime.DaysInMonth(yearNow, monNow); 
for (int i = 1; i <= daysOfMonth; i++) 
{ 
ddlBirDay.Items.Add(new ListItem(i.ToString(), i.ToString())); 
} 
ddlBirDay.Items[dayNow - 1].Selected = true; 
//binding Year 
for (int i = 20; i > 0; i--) 
{ 
ddlBirYear.Items.Add(new ListItem((yearNow - i).ToString(), (yearNow - i).ToString())); 
} 
for (int i = 0; i < 20; i++) 
{ 
ddlBirYear.Items.Add(new ListItem((yearNow + i).ToString(), (yearNow + i).ToString())); 
} 
ddlBirYear.Items.FindByValue(yearNow.ToString()).Selected = true; 
} 

js代码如下（自己写的，不保证完全正确啊）：

 
function ChangeDay() { 
var month = document.getElementById("<%=ddlBirMon.ClientID %>"); 
var year = document.getElementById("<%=ddlBirYear.ClientID %>"); 
var day = document.getElementById("<%=ddlBirDay.ClientID %>"); 
if (month.selectedIndex == 3 || month.selectedIndex == 5 || month.selectedIndex == 8 || month.selectedIndex == 10) { 
if (day.length == 31) { 
if (day.options[30].selected == true) { 
day.options[29].selected = true; 
} 
day.remove(30); 
} 
} 
else{ 
while (day.length < 31) { 
day.add(new Option(day.length+1,day.length+1)); 
} 
} 
if (month.selectedIndex == 1) { 
if (day.length > 28) { 
if (day.selectedIndex == 28) { 
day.options[27].selected = true; 
} 
while (day.length > 28) { 
day.remove(day.length - 1); 
} 
} 
var sy = year.options[year.selectedIndex].value; 
if ((sy % 4 == 0 && sy % 100 != 0) || (sy % 400==0)) { 
day.add(new Option("29", "29")); 
} 
} 
}