Complete Form Field Validation Scripts
These functions perform all of the necessary validations for some common text field types. Simply call the function and it will let you know if the field is valid or if you need to display an error message.
Email Address Validation
There will almost certainly be times when you want to request for an email address to be entered on one of your forms. There is no easy way to validate that the email address that is entered actually exists but we can at least validate that the email address is in an acceptable format that is recognisable as an email address.
There will almost certainly be times when you want to request for an email address to be entered on one of your forms. There is no easy way to validate that the email address that is entered actually exists but we can at least validate that the email address is in an acceptable format that is recognisable as an email address.
Credit Card Validation
It is not possible to use Javascript to check that a credit card number that someone enters into your form belongs to them or that the card number has even been issued to anyone. What you can validate using Javascript is that the number that is entered might be a valid credit card number.
It is not possible to use Javascript to check that a credit card number that someone enters into your form belongs to them or that the card number has even been issued to anyone. What you can validate using Javascript is that the number that is entered might be a valid credit card number.
Date Validation
Dates can be entered in a lot of different formats. This ready to use script can recognise many of the formats that dates can be entered in. It can also validate that the date entered is not in the future or not in the past (whichever is appropriate for your requirements).
Dates can be entered in a lot of different formats. This ready to use script can recognise many of the formats that dates can be entered in. It can also validate that the date entered is not in the future or not in the past (whichever is appropriate for your requirements).