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# Can I limit the zip code field to 5 digits?

MetaLocator's default location search option, typically labelled "zip code" can actually take any user input that can be interpreted as a location.

This means users can search for

* 53211
* Milwaukee
* "City hall"
* 12345 N My Home Address, Denver, CO 80205
* McDonalds on North Ave.

Sometimes, users in the United States would prefer that a full 5-digit zip code be required as input.

This requirement isn't viable when supporting those queries listed above, or when international or alphanumeric postal codes might be involved.

To support only 5-digit postal codes, the solution is to add a bit of JavaScript under **Advanced** > **Custom Head Tag** to the Interface which performs the validation.

```
<script>

jqLocator(document).ready(function(){

jqLocator('#ml_searchform .locator_submit:input[type="submit"]').on('click',function(e){

var ml_language = window.ml_language || {};  
        var isValid = false;  
        var userInput = jqLocator('#postal_code').val();

if(typeof(userInput) === 'string' && userInput.match(/^\d{5}$/)){  
            isValid = true;  
        }

if(!isValid){  
            swal(ml_language.LOCATOR_ERROR,"Please enter a 5-digit US zip code",'error');  
        }

return isValid;  
    });  
});

</script>
```