How do you check if a date is valid?

itbarota · #1 (**permalink**) 12-14-2007, 05:27 AM

Hi all....

How do you check if a date is valid?

Thanks...

Pvinothkumar · #2 (**permalink**) 12-14-2007, 05:30 AM

Hi all...

<script language="JavaScript">

function checkDate(theDate)
{
if (theDate!= "")
{
if (isNaN(Date.parse(theDate)))
{
alert("Please enter yourDate in mm/dd/yy format.");
return false;
}
else
{
return true;
}
}
}
</script>

Thanks...

rajkumar · #3 (**permalink**) 12-14-2007, 06:14 AM

Hi,

I have a popup and I would like to capture the close window event.
How can I do that in javascript?

Thanks
Rajkumar...

velhari · #4 (**permalink**) 12-14-2007, 06:56 AM

Hi,

You want to capture the close window event of popup means, you can use body unload in popup window itself.

Otherwise,
From the parent window, you can be able to check if the popup window is still alive or not by using the following command,

window.opener.closed - return boolean value

GDevakii · #5 (**permalink**) 12-19-2007, 12:06 AM

<html>
<head>
<script language="text/javascript">
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
var i;
for (i = 0; i < s.length; i++){
// Check that current character is number.
var c = s.charAt(i);
if (((c < "0") || (c > "9"))) return false;
}
// All characters are numbers.
return true;
}

function stripCharsInBag(s, bag){
var i;
var returnString = "";
// Search through string's characters one by one.
// If character is not in bag, append to returnString.
for (i = 0; i < s.length; i++){
var c = s.charAt(i);
if (bag.indexOf(c) == -1) returnString += c;
}
return returnString;
}

function daysInFebruary (year){
// February has 29 days in any year evenly divisible by four,
// EXCEPT for centurial years which are not also divisible by 400.
return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
for (var i = 1; i <= n; i++) {
this[i] = 31
if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
if (i==2) {this[i] = 29}
}
return this
}

function isDate(dtStr){
var daysInMonth = DaysArray(12)
var pos1=dtStr.indexOf(dtCh)
var pos2=dtStr.indexOf(dtCh,pos1+1)
var strMonth=dtStr.substring(0,pos1)
var strDay=dtStr.substring(pos1+1,pos2)
var strYear=dtStr.substring(pos2+1)
strYr=strYear
if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
for (var i = 1; i <= 3; i++) {
if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
}
month=parseInt(strMonth)
day=parseInt(strDay)
year=parseInt(strYr)
if (pos1==-1 || pos2==-1){
alert("The date format should be : mm/dd/yyyy")
return false
}
if (strMonth.length<1 || month<1 || month>12){
alert("Please enter a valid month")
return false
}
if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
alert("Please enter a valid day")
return false
}
if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
return false
}
if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
alert("Please enter a valid date")
return false
}
return true
}

function ValidateForm(){
var dt=document.frmSample.txtDate
if (isDate(dt.value)==false){
dt.focus()
return false
}
return true
}

</head>
</script>
<body>
<form name="frmSample" method="post" action="" onSubmit="return ValidateForm()">
<p>Enter a Date <font color="#CC0000"><b>(mm/dd/yyyy)</b></font>
:
<input type="text" name="txtDate" maxlength="10" size="15">
</p>
<p>
<input type="submit" name="Submit" value="Submit">
</p>
</form>
</body>
</html>

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

LinkBacks (?) LinkBack to this Thread: http://www.discussweb.com/html-css-javascript-coding-techniques/4743-how-do-you-check-if-date-valid.html
Posted By	For	Type	Date
DiscussWeb IT Community - Technical Support and Technology Discussions	This thread	Refback	12-14-2007 07:02 AM

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Check if a date is valid.	itbarota	HTML, CSS and Javascript Coding Techniques	3	04-10-2008 04:04 PM
Check that a string contains a date.	itbarota	HTML, CSS and Javascript Coding Techniques	2	03-11-2008 09:01 PM
How do you check if a date is valid?	itbarota	HTML, CSS and Javascript Coding Techniques	4	12-30-2007 11:21 PM
How can I show the documents last modified date in the format: month, date, year, tim	Pvinothkumar	HTML, CSS and Javascript Coding Techniques	3	12-28-2007 05:58 AM
How to convert a date to a globally accepted date format, in DOT NET 2005?	Archer	C# Programming	1	07-25-2007 03:21 AM