keyUp on 4th Press

[tomyknoker]

I have a AJAX script which searches postcodes in my database to find the nearest store... Works really well... Initially the postcodes were 4 characters long but a few are actually 3 characters long, and the script only searches the database once the 4th key is pressed is there anyway to make it work on the 3rd key press AND the 4th? My code is as follows:

<script src="http://yui.yahooapis.com/2.2.2/build/yahoo-dom-event/yahoo-dom-event.js" type="text/javascript"></script>
<script src="http://yui.yahooapis.com/2.2.2/build/connection/connection-min.js" type="text/javascript"></script>
<script type="text/javascript">
var $D = YAHOO.util.Dom;     //YAHOO DOM
var $E = YAHOO.util.Event; //YAHOO Event
var $C = YAHOO.util.Connect; //YAHOO connection manager
 
function init() {
    $E.on('Code', 'keyup', chkZip);
	$E.on('findStore', 'submit', function(e) {$E.stopEvent(e);});
}
 
//See if code is fully entered (4 digits)
function chkZip(e) {
    var postCode = $E.getTarget(e).value;
    if(postCode.length < 4) return; //Ignore if not complete
    
    var storeSpan = document.getElementById('store'); //Element to put store name into
    var AjaxObj = {
        success: function(o) {
            storeSpan.innerHTML = o.responseText;
        },
        failure: function(o) {
            storeSpan.innerHTML = "<em>Error - Please try again</em>";
        },
        timeout: 5000
    }
    $C.asyncRequest('GET', 'findMyRep.php?postCode=' + encodeURIComponent(postCode), AjaxObj);
            
}
$E.onDOMReady(init);
</script>

[thetestingsite]

Change this line:

if(postCode.length < 4) return; //Ignore if not complete

to this:

if(postCode.length < 3) return; //Ignore if not complete

Hope this helps.

[Twey]

Then it will fire on 1, 2, and 3, but not 4.

if(postCode.length === 3 || postCode.length === 4)

would probably be easiest.

/FURTHER EDIT: That's just silly. Why did I write that?

[tomyknoker]

Hey Twey I tried that but it still will only fire on the 4th key up... Any ideas?

[tomyknoker]

Also this is the line I have on my php page which the form get's posted too on the 4th key up...

if(!isset($_GET['postCode']) OR !preg_match('/^[0-9]{4}$/', $_GET['postCode'])) exit('Invalid Postcode'); 

[jscheuer1]

I'm just guessing but:

{4} 

might need to be:

{3,4} 

if(postCode.length < 3) return; //Ignore if not complete

Then it will fire on 1, 2, and 3, but not 4.

Actually, it will return (do nothing) on 1 and 2, if the length is 3 or greater, it will continue processing.

[Twey]

Sorry, I missed out a minus sign that was rather important. Edited.

Actually, it will return (do nothing) on 1 and 2, if the length is 3 or greater, it will continue processing.

There was an edit: it originally said <= 3. I meant that the if block would fire.

[thetestingsite]

There was an edit: it originally said <= 3. I meant that the if block would fire.

Yea, I realized I put that there and took it out imediately. You must have been reading it as I was editting.

[tomyknoker]

It is working now guys thanks! But is a bit slow on the keyUp now that it also checks on the 3rd keyUp... So if a user types 2000, the first time it says Invalid Postcode, if you retype it works... Is that just a glitch I have to put up with?