NewSourceMedia Blog » JS Forms

Javascript Non Alphanumeric Characters Regex

admin — Fri, 29 Dec 2006 00:22:11 +0000

Using javascript regular expressions to stop users from entering non-aphanumeric characters or white spaces Say you want to stop users from entering non-aphanumeric characters or white spaces. Using regular expressions would be the easiest method: Here is my javascript code: For numbers only use /^[0-9]+$/ For mixed text and numbers, with spaces /^[0-9a-zA-Zs]+$/ Here are more useful regular expressions:

[a-zA-Z] any letter
d any number; same as [0-9]
D any NOT number; same as [^0-9]
w any alphanumeric character; same as [a-zA-Z-0-9_]
W any NON-alphanumeric character; same as [^a-zA-Z0-9_]
s any whitespace (tab, space, newline, etc...)
S any NON-whitespace
n newline
t tab

To view a full html sample of the above code click the links below using regular expressions in JavaScript

Javascript Email Validation Form

admin — Fri, 29 Dec 2006 00:22:11 +0000

Check user email address forms to make sure they are valid using JavaScript before saving their info. The JavaScript code is provided here. The function below checks if the content has the general syntax of an email. This means that the input data must contain at least an @ sign and a dot (.). Also, the @ must not be the first character of the email address, and the last dot must at least be one character after the @ sign:

Address Auto-Fill Ckeck Box

admin — Sat, 28 Feb 2004 00:22:11 +0000

Javascript code that automatically fills in the address in all places needed on the page after just once entering it and selecting the check box. Introduction: I ran across this code when working on a registration product site. The goal is to save the user's time by not having them fill in the same address over and over, if the address for there billing is the same as the mailing address. You can view a working form by clicking here.

Source Code











Mailing Address

City: 

State: 

Billing Address

( same as above)


City: 

State:

Telephon Check Box

admin — Sat, 28 Feb 2004 00:22:11 +0000

Javascript code that automatically fills in the telephone number in all places needed after just once entering it and selecting a check box. Introduction: I ran accross this code when working on a registration product site. The goal is to save the user's time by not having them fill in the same telephone number over and over, if the number is the same as other data fields. You can view a working form by clicking here.

Source Code



NSM | Tele Check Box



Home Telephone:



Work Telephone:


(check if same as home number)