注意了！日期急难有关问题！

各位高手注意了！！！！日期急难问题！！！！
我现在做了一个输入框，日期是自己手写进去的，格式为20070801，然后我点下一个输入框，可以让刚才那个输入框的日期自动+1，例如20070802，当然要有对月对日和对年的判断，不能有13月，32日等，还要考虑闰年的问题

[解决办法]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN ">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME= "Generator " CONTENT= "EditPlus ">
<META NAME= "Author " CONTENT= " ">
<META NAME= "Keywords " CONTENT= " ">
<META NAME= "Description " CONTENT= " ">
</HEAD>

<BODY>
<script>

//日期+n天
function addDays(date1,days){

var monthDays=[0,3,0,1,0,1,0,0,1,0,0,1];
var regexp=/^(\d{1,4})[-|\.]{1}(\d{1,2})[-|\.]{1}(\d{1,2})$/;
regexp.test(date1);
var date1Year=RegExp.$1;
var date1Month=RegExp.$2;
var date1Day=RegExp.$3;
firstDate=new Date(date1Year,date1Month-1,date1Day);
alert(firstDate.toLocaleDateString())
var ccc=new Date(firstDate.getTime()+days*1000*60*60*24)
var result=ccc.getYear()+ "- "+(ccc.getMonth()+1)+ "- "+ccc.getDate();
alert(result)

}
addDays( '2007-08-09 ', '2 ')
addDays( '2007-01-31 ', '1 ')
</script>

<input type= "text " id= "aaa ">
<select id= "sel " style= "display:none ">
</select>
</BODY>
</HTML>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN ">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME= "Generator " CONTENT= "EditPlus ">
<META NAME= "Author " CONTENT= " ">
<META NAME= "Keywords " CONTENT= " ">
<META NAME= "Description " CONTENT= " ">
<script language=javascript>
String.prototype.isTime = function()
{
var r = this.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2})$/);
if(r==null)return false; var d = new Date(r[1], r[3]-1,r[4],r[5],r[6],0);
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]&&d.getHours()==r[5]&&d.getMinutes()==r[6]);
}
alert( "2002-1-31 12:34 ".isTime());
alert( "2001-2-29 12:54 ".isTime());
alert( "2002-1-41 12:00 ".isTime());

String.prototype.isDate = function()
{
var r = this.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
if(r==null)return false; var d = new Date(r[1], r[3]-1,r[4]);
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
}
alert( "2002-1-31 ".isDate());
alert( "2001-2-29 ".isDate());
alert( "2002-1-41 ".isDate());
</script>
</HEAD>

<BODY>

</BODY>
</HTML>

[解决办法]
<html>
<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 ">
<title> new page </title>
<script>
function a(){
var str=document.all.txt1.value;
if(str.length==8){
var y=str.substring(0,4);
var m=str.substring(4,6);
var d=str.substring(6,8);
var date=new Date(y,parseInt(m,10)-1,d);
if(date.getDate()==parseInt(d,10)&&date.getMonth()==(parseInt(m,10)-1)&&date.getFullYear()==parseInt(y)){

var curDate=new Date();
curDate.setTime(date.getTime()+24*60*60*1000);
var curStr=curDate.getFullYear()+((parseInt(curDate.getMonth())+1> 9)? " ": "0 ")+(parseInt(curDate.getMonth())+1)+(curDate.getDate()> 9? " ": "0 ")+curDate.getDate();
document.all.txt2.value=curStr;
}else{
alert( "输入日期不正确! ");
}
}else{
alert( "输入日期不正确! ");
}
}
</script>
</head>
<body>
<input type=text id=txt1 value= " ">
<input type=text id=txt2 value= " " onfocus= "a() ">
</body>
</html>
[解决办法]
<html>
<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 ">
<title> new page </title>
<script>
function ge (id){ return document.getElementById(id); };
function a(){
var d = new Date(ge( "txt1 ").value.replace(/^(\d{4})(\d\d)(\d\d)$/, "$1/$2/$3 "));
if(isNaN(d)){alert( "日期格式非法! ");return;}
d.setDate(d.getDate()+1);
var s = " "+d.getFullYear()+ "- "+(d.getMonth()+1)+ "- "+d.getDate();
ge( "txt2 ").value = s.replace(/(\d)(\D)(?=(\d|$))/g, "$10$2 ").replace(/\D/g, " ")
}
</script>
</head>
<body>
<input type=text id=txt1 value= "20070802 ">
<input type=text id=txt2 value= " " onfocus= "a() ">
</body>
</html>

[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 ">

</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>

注意了！日期急难有关问题！

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