AJAX form with certain letter and number combination

[zeroge]

Hi

I tried to look up the net since two days and can't find a solution. I want a text field where the first input should be a L,Z, or F and the - with a pace - followed by 8 numbers.

Example: F-29820288

I tried imasking but no luck ... Would anyone know the formula?

Thanks

[oesxyl]

Hi

I tried to look up the net since two days and can't find a solution. I want a text field where the first input should be a L,Z, or F and the - with a pace - followed by 8 numbers.

Example: F-29820288

I tried imasking but no luck ... Would anyone know the formula?

Thanks
try to use onchange event and a regex, For example:

^[LZF]-\d{8}$


best regards