Feedback on: Addressing Form Field Validation with Regular Expressions and JavaScript 1.2

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Feedback on:
Addressing Form Field Validation with Regular Expressions and JavaScript 1.2

Sent by
Stefan Berglund on December 03, 2001 at 18:05:59:

Comments:
The emailchecking is just plain wrong!
First: You can not check that an address is correct except trying to send mail to it and wait for an answer.

Second: The code that checks for a syntactically correct mailaddress flags syntactically correct addresses as invalid, for example the common syntax local+tag@domain or the address *@domain.
As it is very complicated to make a 100% correct check, why not make a check that should pass all valid (except uucp-style) and some invalid ones as well, your MTA must do the check for real anyway, so:

^.*@[^.]+(\.[^.]+)+$

Or one that obeys the KISS-principle:

.+

Other feedback on 'Addressing Form Field Validation with Regular Expressions and JavaScript 1.2' - show all

• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Wednesday September 19, 2007 at 10:11:41
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Dick Curtis May 17, 2002 at 18:34:03:
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Dick Curtis May 17, 2002 at 18:33:19:
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Stefan Berglund December 03, 2001 at 18:05:59:
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - frank koenen September 06, 2001 at 15:11:22:
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - peter September 02, 2001 at 13:43:37:
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Ian Anderson August 11, 2001 at 15:49:45:
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Liam Morley 00:17:04 4/21/01
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Joel Finkel 00:41:52 2/21/01
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Suma Thomas 10:44:31 8/10/00
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Suma Thomas 10:42:13 8/10/00
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Dave Habros 21:08:57 7/20/00
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Vlad Gertsen 13:19:28 4/25/00
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Jimmy Devenport 12:53:18 1/13/00
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Ed Bradburn 07:53:26 11/25/99
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - David Swain 10:26:31 11/02/99
• Addressing Form Field Validation with Regular Expressions and JavaScript 1.2 - Juergen Barthel 07:50:48 7/06/99