How to set maximum length in input type=text to certain character

[omi]

Hi
I am still in learning phase. I am dealing with a form where I need to take some character, I want that it should not be more than 8 character. I am using text field.

Below is the example code, now what should I add in it to set maximum limit ?

Code: [Select]

<input type="text" name="userid" />
Thanx in advance for help!