请教关于如何作有效日期选择
是这样的,我在网页中,想用个文本框和按钮做一个有效日期选择,当单击按钮时可以出现年月日的选择,选择后在文本中显示,请问下这个代码应该怎么写呢?
[解决办法]
1、用输入的年、月、日为参数创建一个DATE对象
2、该DATE对象的getdate(),getmonth(),getyear()只要有一个与输入值不同即表示输入的不是正确日期
3、剩下的随便你处理了
[解决办法]
<html>
<head> <meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 ">
<title> 日期选择 - BY ziyue </title>
<script language= "JavaScript " type= "text/JavaScript ">
/*=======Calendar.js=======By Jiang Hongbin=======*/
var months = new Array( "一月 ", "二月 ", "三月 ", "四月 ", "五月 ", "六月 ", "七月 ", "八月 ", "九月 ", "十月 ", "十一月 ", "十二月 ");
var daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
var days = new Array( "日 ", "一 ", "二 ", "三 ", "四 ", "五 ", "六 ");
var today;
document.writeln( " <div id= 'Calendar ' style= 'position:absolute; z-index:1; visibility: hidden; filter:\ "progid:DXImageTransform.Microsoft.Shadow(direction=135,color=#999999,strength=3)\ " '> </div> ");
function getDays(month, year)
{
//下面的这段代码是判断当前是否是闰年的
if (1 == month)
return ((0 == year % 4) && (0 != (year % 100))) || (0 == year % 400) ? 29 : 28;
else
return daysInMonth[month];
}
function getToday()
{
//得到今天的年,月,日
this.now = new Date();
this.year = this.now.getFullYear();
this.month = this.now.getMonth();
this.day = this.now.getDate();
}
function getStringDay(str)
{
//得到输入框的年,月,日
var str=str.split( "- ")
this.now = new Date(parseFloat(str[0]),parseFloat(str[1])-1,parseFloat(str[2]));
this.year = this.now.getFullYear();
this.month = this.now.getMonth();
this.day = this.now.getDate();
}
function newCalendar() {
var parseYear = parseInt(document.all.Year.options[document.all.Year.selectedIndex].value);
var newCal = new Date(parseYear, document.all.Month.selectedIndex, 1);
var day = -1;
var startDay = newCal.getDay();
var daily = 0;
if ((today.year == newCal.getFullYear()) &&(today.month == newCal.getMonth()))
day = today.day;
var tableCal = document.all.calendar;
var intDaysInMonth =getDays(newCal.getMonth(), newCal.getFullYear());
for (var intWeek = 1; intWeek < tableCal.rows.length;intWeek++)
for (var intDay = 0;intDay < tableCal.rows[intWeek].cells.length;intDay++)
{
var cell = tableCal.rows[intWeek].cells[intDay];
if ((intDay == startDay) && (0 == daily))
daily = 1;
if(day==daily) //今天，调用今天的Class
{
cell.style.background= '#6699CC ';
cell.style.color= '#FFFFFF ';
//cell.style.fontWeight= 'bold ';
}
else if(intDay==6) //周六
cell.style.color= 'green ';
else if (intDay==0) //周日
cell.style.color= 'red ';
if ((daily > 0) && (daily <= intDaysInMonth))
{
cell.innerText = daily;
daily++;
}
else
cell.innerText = " ";
}
}
function GetDate(InputBox)
{
var sDate;
//这段代码处理鼠标点击的情况
if (event.srcElement.tagName == "TD ")
if (event.srcElement.innerText != " ")
{
sDate = document.all.Year.value +(document.all.Month.value> 9? "- ": "-0 ")+ document.all.Month.value +(event.srcElement.innerText> 9? "- ": "-0 ")+ event.srcElement.innerText;
eval( "document.all. "+InputBox).value=sDate;
HiddenCalendar();
}
}
function HiddenCalendar()
{
//关闭选择窗口
document.all.Calendar.style.visibility= 'hidden ';
}
function ShowCalendar(InputBox)
{
var x,y,intLoop,intWeeks,intDays;
var DivContent;
var year,month,day;
//var o=document.getElementById(InputBox);
var o=InputBox;
var oid=o.id;
var thisyear; //真正的今年年份
if(!oid)oid=o.name;
thisyear=new getToday();
thisyear=thisyear.year;
today = o.value;
if(isDate(today))
today = new getStringDay(today);
else
today = new getToday();
//显示的位置
x=o.offsetLeft;
y=o.offsetTop;
while(o=o.offsetParent)
{
x+=o.offsetLeft;
y+=o.offsetTop;
}
document.all.Calendar.style.left=x+2;
document.all.Calendar.style.top=y+20;
document.all.Calendar.style.visibility= "visible ";
//下面开始输出日历表格(border-color:#9DBAF7)
DivContent= " <table border= '0 ' cellspacing= '0 ' style= 'border:1px solid #0066FF; background-color:#EDF2FC '> ";
DivContent+= " <tr> ";
DivContent+= " <td style= 'border-bottom:1px solid #0066FF; background-color:#C7D8FA '> ";
//年
DivContent+= " <select name= 'Year ' id= 'Year ' onChange= 'newCalendar() ' style= 'font-family:Verdana; font-size:12px '> ";
for (intLoop = thisyear - 100; intLoop < (thisyear + 2); intLoop++)
DivContent+= " <option value= " + intLoop + " " + (today.year == intLoop ? "Selected " : " ") + "> " + intLoop + " </option> ";
DivContent+= " </select> ";
//月
DivContent+= " <select name= 'Month ' id= 'Month ' onChange= 'newCalendar() ' style= 'font-family:Verdana; font-size:12px '> ";
for (intLoop = 0; intLoop < months.length; intLoop++)
DivContent+= " <option value= " + (intLoop + 1) + " " + (today.month == intLoop ? "Selected " : " ") + "> " + months[intLoop] + " </option> ";
DivContent+= " </select> ";
DivContent+= " </td> ";
DivContent+= " <td style= 'border-bottom:1px solid #0066FF; background-color:#C7D8FA; font-weight:bold; font-family:Wingdings 2,Wingdings,Webdings; font-size:16px; padding-top:2px; color:#4477FF; cursor:hand ' align= 'center ' title= '关闭 ' onClick= 'javascript:HiddenCalendar() '> S </td> ";
DivContent+= " </tr> ";
DivContent+= " <tr> <td align= 'center ' colspan= '2 '> ";
DivContent+= " <table id= 'calendar ' border= '0 ' width= '100% '> ";
//星期
DivContent+= " <tr> ";
for (intLoop = 0; intLoop < days.length; intLoop++)
DivContent+= " <td align= 'center ' style= 'font-size:12px '> " + days[intLoop] + " </td> ";
DivContent+= " </tr> ";
//天
for (intWeeks = 0; intWeeks < 6; intWeeks++)
{
DivContent+= " <tr> ";
for (intDays = 0; intDays < days.length; intDays++)
DivContent+= " <td onClick= 'GetDate(\ " " + oid + "\ ") ' style= 'cursor:hand; border-right:1px solid #BBBBBB; border-bottom:1px solid #BBBBBB; color:#215DC6; font-family:Verdana; font-size:12px ' align= 'center '> </td> ";
DivContent+= " </tr> ";
}
DivContent+= " </table> </td> </tr> </table> ";
document.all.Calendar.innerHTML=DivContent;
newCalendar();
}
function isDate(dateStr)
{
var datePat = /^(\d{4})(\-)(\d{1,2})(\-)(\d{1,2})$/;
var matchArray = dateStr.match(datePat);
if (matchArray == null) return false;
var month = matchArray[3];
var day = matchArray[5];
var year = matchArray[1];
if (month < 1 || month > 12) return false;
if (day < 1 || day > 31) return false;
if ((month==4 || month==6 || month==9 || month==11) && day==31) return false;
if (month == 2)
{
var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
if (day > 29 || (day==29 && !isleap)) return false;
}
return true;
}
</script>
<style type= "text/css ">
<!--
td,input {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 12px;
}
-->
</style>
</head>
<body>
<form name= "form1 " method= "post " action= " ">
<table width= "500 " border= "0 " align= "center " cellspacing= "1 " bgcolor= "#CCCCCC ">
<tr bgcolor= "#FFFFFF ">
<td align= "right "> 您的生日： </td>
<td> <input name= "birthday " type= "text " id= "birthday " title= "点击选择 " onClick= "javascript:ShowCalendar(this) " size= "20 ">
<input type= "button " name= "Submit " value= "选 择 " onClick= "javascript:ShowCalendar(form1.birthday) "> </td>
</tr>
</table>
</form>
</body>
</html>
