Question

i was wondering whether it was possible for jquery to make a text field only accept a combination of 3 letters and 4 numbers (eg ABC1234) – in that order?

Answer 1

http://jsfiddle.net/MEvj3/

Here’s a simplified example of one way.

<input type="text" class="code" />

$("input.code").keyup(function(){
    this.value = this.value.match(/[A-Z]{3}([0-9]{1,4})?|[A-Z]{1,3}/i)[0];
});