Code works in IE, but only works sometimes in FireFox

[smoitra]

Hi All,

I am new here.I have a textbox in my form where user is supposed to enter zip codes and as soon they enter that and press tab or click elsewhere on the form it is supposed to go to javascript function called UpdateCityState which takes that textbox as object and updates City and State Values.The code is

<asp:textbox id="txtZip" onkeydown="if ((event.which &amp;&amp; event.which == 13) || (event.keyCode &amp;&amp; event.keyCode == 13)) {txtName.focus();return false;}" runat="server" name="txtZip" width="75px" maxlength="9" enabled="False" autopostback="true" onchange="UpdateCityState(this);">

function UpdateCityState(objControl) {
var strVars = "";
var ZipValid = /^\d{5}(\d{4})?/;
 
if (document.getElementById('ddCountry').value == 'E1')
    ZipValid = /\w\d\w(\s)?\d\w\d/;
if (ZipValid.test(objControl.value))
{
    strVars = "Zip=" + document.getElementById('txtZip').value + "&Country=" + document.getElementById('ddCountry').value + "&Ship=" + document.getElementById('ddShipTo').value;
                 }
 else
strVars = "Clear=All&Country=" + document.getElementById('ddCountry').value;
                parent.ifCityState.location.replace("ddCityState.aspx?" + strVars);
            }

Problem is that this piece of code fires perfeclty in internet explorer but in firefox sometimes it does sometimes it doesn't.It's very unpredictable.So my question is why is this happening in firefox and how can i stop this ?

Please help

[pbmods]

Heya, smoitra. Welcome to TSDN!

Please do not type in ALL CAPS. Not only does it violate the Posting Guidelines, it also makes people less likely to want to read your problem and post solutions!

Please use CODE tags when posting source code. See the REPLY GUIDELINES on the right side of the page next time you post.

Changed thread title to better describe the problem (did you know that thread titles that do not follow the Posting Guidelines actually get FEWER responses?).

[acoder]

Problem is that this piece of code fires perfeclty in internet explorer but in firefox sometimes it does sometimes it doesn't.It's very unpredictable.So my question is why is this happening in firefox and how can i stop this ?

So when it doesn't work in Firefox, what does it do?

Post the HTML code that the asp code turns into (view source on the client).

[smoitra]

So when it doesn't work in Firefox, what does it do?

Post the HTML code that the asp code turns into (view source on the client).

The screen blinks as if it is trying to do something but then nothing gets populated in the City/State box

[acoder]

The screen blinks as if it is trying to do something but then nothing gets populated in the City/State box

Does this happen for only some input or does the same input sometimes works and sometimes doesn't work?

Post the relevant HTML, e.g. txtZip, txtName, ddCountry, ddShipTo, the City/State box, etc.

[smoitra]

The same input sometime works and sometime doesn't

[acoder]

Post the rest of the relevant HTML code or a link to a test page.