Hello,
Our group is developing surveys for a large study, and we give each participant an ID number. For new participants, the format is "AJA-XXXX" where the X's are digits 0-9. For visiting participants, the format is "AJA-XXXX.X." Here are some ID numbers that fit:
> * 1. AJA-2001
> * 2. AJA-2163
> * 3. AJA-2003.1
> * 4. AJA-2002.2
> 
However, we don't want the following:
> * aja-2002  (first part not capitalized)
> * AJA3012 (no dash)
> * AJA-2009. (a period, but no digit afterwards)
> * AJA-1008.01 (two digits after the period)
> 
After some googling, I came up with ``[T][R][T]\\-\\d{4}[\\.]?[\\d{1}]?`` but it didn't work :/ 
I would be extremely grateful for any help or suggestions. Thanks!
        
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            I have tried this through javascript..
jQuery("[id='QR~QID15']").bind('keyup', function(e) {
		var s=jQuery("[id='QR~QID15']").val();
		
		if(s.length == 8) {
			
			if(s.substring(0,3) != "AJA" || s.charAt(3) != '-' )
			{
				alert("Wrong input");
			}
			else
			{
				var n=parseInt( s.substring(4,8) );
				var i=0;
				
					while(n!=0)
					{
						n=Math.floor(n/10);
						i++;
					}
					if(i != s.substring(4,8).length)
						alert("Wrong input");
			}
		}
		
		if(s.length>8)
			
			alert("Wrong input");
});
                
    
                                    
            Try this regex:
^AJA\\-[0-9]{4}(\\.[0-9])?$
One issue is that Qualtrics regex validation is case insensitive.  So, you'll have to use JavaScript to convert to upper case.
```
Qualtrics.SurveyEngine.addOnload(function() {
	jQuery("#"+this.questionId+" .InputText").on('blur', function() {
    	    this.value = this.value.toUpperCase();
	});
});
```
                
    
                                    
            hi @sajeevan ,
Regex for this foramt e.g AJA-2001.1: /AJA-[0-9]{4}.[0-9]{1}/g
OR
Regex for this foramt e.g AJA-2001: /AJA-[0-9]{4}/g
You can use this regex in custom validation options.
! 
                
    
                                     
                To whoever is searching.
For the insensitivity of the letters I simply added the “/” before and after then if works : /^[A-Z]{2}$/
I struggle a long time before figuring that out. Without the “/”s, it is indeed insensitive.
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