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Regular Expression: evaluating datetime
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ozzy cp
<html><div style='background-color:'><DIV>
<P>Hi, </P>
<P>I have the following code to evaluate datetime using regular expressions. I want to make sure that the user enters<FONT color=#ff0033> ONLY </FONT>in the following format: <FONT color=#ff0033>'12/25/2002 13:33:33' </FONT>which is <FONT color=#ff0033>military time</FONT>. I think this answer will benifit many people who wants to validate datetime forms online. The code below matches: 4/4/2004 ; 4/4/2004 4:44  and 4/4/2004 4:44:44. I want to match [4/4/2004  14:44:44] and nothing else. Can someone help?! Thank you in advance.</P></DIV>
<P>var results </P>
<P>function checkdatetime() </P>
<P>{ var str=document.validation.datetimecheck.value </P>
<P>var filter= /^((((([13578])|(1[0-2]))[\-\/\s]?(([1-9])|([1-2][0-9])|(3[01])))|((([469])|(11))[\-\/\s]?(([1-9])|([1-2][0-9])|(30)))|(2[\-\/\s]?(([1-9])|([1-2][0-9]))))[\-\/\s]?\d{4})(\s((([0-9][0-9])|(1[02]))\:([0-5][0-9])((\s )|(\:([0-5][0-9])))))?$/i </P>
<P>if (filter.test(str)) results=true else { alert("datetime Required FORMAT: mm/dd/yyyy hh:mm:ss") results=false } return (results) } </COMMENT><COMMENT>

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</COMMENT><BR><BR>This is very import!<BR><BR><BR></P>
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Kirk Allen Evans
Here is a simplistic regexp that only validates the format, not the content:

^\d{1,2}\/\d{1,2}\/\d{4}\s\d{1,2}\:\d{1,2}\:\d{1,2}$

For instance, it would treat the following as valid:

99/99/9999 99:99:99

If you need it quick (and you also need to understand what it is doing to
maintain it) you could then parse the string into variables and perform date
math on its parts. There are several different approaches to date
validation in JavaScript.

http://developer.irt.org/script/1.htm
http://www.bitbucketheaven.com/code/isdate.shtml
http://www.mattkruse.com/javascript/date/source.html

HTH -
Kirk Allen Evans
-----Original Message-----
From: ozzy cp [mailto:Click here to reveal e-mail address]
Sent: Friday, June 14, 2002 12:38 PM
To: aspngregexp
Subject: [aspngregexp] Regular Expression: evaluating datetime

Hi,

I have the following code to evaluate datetime using regular expressions.
I want to make sure that the user enters ONLY in the following format:
'12/25/2002 13:33:33' which is military time. I think this answer will
benifit many people who wants to validate datetime forms online. The code
below matches: 4/4/2004 ; 4/4/2004 4:44 and 4/4/2004 4:44:44. I want to
match [4/4/2004 14:44:44] and nothing else.. Can someone help?! Thank you
in advance.

var results

function checkdatetime()

{ var str=document.validation.datetimecheck.value

var filter/^((((([13578])|(1[0-2]))[\-\/\s]?(([1-9])|([1-2][0-9])|(3[01])))|((([469])|
(11))[\-\/\s]?(([1-9])|([1-2][0-9])|(30)))|(2[\-\/\s]?(([1-9])|([1-2][0-9]))
))[\-\/\s]?\d{4})(\s((([0-9][0-9])|(1[02]))\:([0-5][0-9])((\s )|(\:([0-5][0-
9])))))?$/i

if (filter.test(str)) results=true else { alert("datetime Required FORMAT:
mm/dd/yyyy hh:mm:ss") results=false } return (results) }

This is very import!

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Darren Neimke
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