How to validate passport number using javascript ?

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Javascript

PHP

HTML5

I did my own research and find out that following guidelines and assumptions are followed while validating Passport Numbers. The Passport Number is of the following format :

A12 34567

The format will be same for all the Passport numbers. i.e. the first character is an upper case letter of the English alphabet, followed by 2 numbers, then an optional space followed by 5 numbers.

We bring additional assumptions:

The first digit or the last digit will never be 0
The first character cannot be Q, X or Z.

<input type="radio"  class="checkPassport"><label>Passport Number</label></input><input type="hidden"  id="passport" class="hiddenPassport" value="" />
<input type="text" id="passport" class="textPassport" name="passport" style="display:none" placeholder="Enter your passport number"  <?php getpostvalue('passport');?> />

I cant seem to get the right logic for this, please help.

JavaScript code

<pre lang="Javascript">
function said_validate(passport)
{
        var regsaid = /[a-zA-Z]{2}[0-9]{7}/;
 
        if(regsaid.test(passport) == false)
        {
            document.getElementById("status").innerHTML = "Passport is not yet valid.";
        }
        else
        {
            document.getElementById("status").innerHTML = "You have entered a valid Passport number!";
        }
}