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stealthcow · 26-10-2006, 06:09

Regex's have never been my strong point...

I need a javascript function that automatically removes any chracter entered into a form field EXCEPT for a-z A-Z 0-9 ' _ , ( ) @ $ £ & -

any help would be appreciated!

smallbeer · 26-10-2006, 06:22

how do you mean "automatically"? you mean when the the form is submitted?

freelancr · 26-10-2006, 07:28

If you are doing this to validate user input to prevent SQL injection - I would also make sure your php (or whatever language you use) also does the same, as JS can be disabled and bots usually don't have it.

I'm guessing it is for a contact form, if so you are probably best to validate each input using a different criteria, as some of those characters dont belong in email addresses, etc.

Suigeneriz · 26-10-2006, 10:42

Write your own shitt:P

d*d · 26-10-2006, 10:55

Quote:

Originally Posted by Suigeneriz

Write your own shitt:P

that's the spirit, enjoy your stay

stealthcow · 26-10-2006, 10:58

by automatically, i mean as you type, it removes the "bad" character - don't worry about that part, i can handle it..! (it was just to give you some idea of what i was trying to achieve)

more importantly, i just need help with the regex

freelancr - dont worry, the javascript is just being used to make the interface more user friendly, there is a lot of checking on the server side

freelancr · 26-10-2006, 11:51

removing stuff as you type eh, that sounds clever, if you get it to work post up a link of an example!

stickmus · 27-10-2006, 08:56

Can you capture the input before it gets through, in which case you'd just need to match on those:
[A-Z0-9'_,()@$£&]

Then just reject anything that doesn't match. Might need some escapes in there though.

Suigeneriz · 28-10-2006, 05:36

Yeah freelancr are not the only one who would like a link

Suigeneriz · 28-10-2006, 05:53

Going to try to make that javascript function myself.

26-10-2006, 06:09	#1 (permalink)
stealthcow knocking heads Join Date: Jul 2003 Location: London, UK Posts: 1,914	Javascript auto remove invalid characters Regex's have never been my strong point... I need a javascript function that automatically removes any chracter entered into a form field EXCEPT for a-z A-Z 0-9 ' _ , ( ) @ $ £ & - any help would be appreciated!

26-10-2006, 06:22	#2 (permalink)
smallbeer I Ain't Losing Any Sleep™ Join Date: Apr 2003 Posts: 5,200	how do you mean "automatically"? you mean when the the form is submitted? __________________ That's fuckin' ingenious, if I understand it correctly. It's a Swiss fuckin' watch.

27-10-2006, 08:56	#8 (permalink)
stickmus hmmm... Join Date: Jan 2004 Location: Yorkuk Posts: 2,127	Can you capture the input before it gets through, in which case you'd just need to match on those: [A-Z0-9'_,()@$£&] Then just reject anything that doesn't match. Might need some escapes in there though. __________________ George Smith - a vain attempt to get higher on google for my name

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26-10-2006, 07:28	#3 (permalink)
freelancr Senior Member Join Date: Oct 2006 Posts: 2,175	If you are doing this to validate user input to prevent SQL injection - I would also make sure your php (or whatever language you use) also does the same, as JS can be disabled and bots usually don't have it. I'm guessing it is for a contact form, if so you are probably best to validate each input using a different criteria, as some of those characters dont belong in email addresses, etc.

26-10-2006, 10:42	#4 (permalink)
Suigeneriz Norwegian Viking™ Join Date: Oct 2006 Location: Norway Posts: 55	Write your own shitt:P

26-10-2006, 10:58	#6 (permalink)
stealthcow knocking heads Join Date: Jul 2003 Location: London, UK Posts: 1,914	by automatically, i mean as you type, it removes the "bad" character - don't worry about that part, i can handle it..! (it was just to give you some idea of what i was trying to achieve) more importantly, i just need help with the regex freelancr - dont worry, the javascript is just being used to make the interface more user friendly, there is a lot of checking on the server side

26-10-2006, 11:51	#7 (permalink)
freelancr Senior Member Join Date: Oct 2006 Posts: 2,175	removing stuff as you type eh, that sounds clever, if you get it to work post up a link of an example!

28-10-2006, 05:36	#9 (permalink)
Suigeneriz Norwegian Viking™ Join Date: Oct 2006 Location: Norway Posts: 55	Yeah freelancr are not the only one who would like a link

28-10-2006, 05:53	#10 (permalink)
Suigeneriz Norwegian Viking™ Join Date: Oct 2006 Location: Norway Posts: 55	Going to try to make that javascript function myself.

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