JavaScript query: Why does code return NULL in Internet Explorer but functions correctly in FireFox?

In my external .js file, I have successfully linked this function...

 function SubmitAge(age, UpdatePanelID, HiddenAgeID) {
  $get(HiddenAgeID).value = age;
  __doPostBack(UpdatePanelID);
 }

I am triggering it from an onClick event of an a href="#" tag.

(tags removed to avoid formatting issues)

a href="#" onclick="SubmitAge(24, 'ctl00_MainContent_arFrom_upAgeRange', 'MainContent_arFrom_HiddenAge')" runat="server" 24 /a

However, I am encountering an error on the first line of the function (line with $get(HiddenAgeID)... etc...)

Error:
Microsoft JScript runtime error: 'null' is null or not an object

When inspecting in Visual Studio .NET, HiddenAgeID shows as an "Undefined identifier Error" while UpdatePanelID appears fine. This issue has left me puzzled and seeking assistance. Any help is appreciated.

Update: Interestingly, the function works flawlessly in FireFox but throws an error in Internet Explorer. It should ideally work in both browsers, so I'm unsure what's causing the discrepancy.

c#asp.netjavascriptvb.netajax

Answer №1

Is the method being invoked correctly? It's a common mistake to call the method with only two parameters in JavaScript, where the third parameter would default to undefined. Alternatively, you may be unintentionally passing an undefined value without being aware of it.

Oh, I see that you've made changes to the question. In that case, make sure to verify what $get(HiddenAgeID) is returning - it's likely returning null because it cannot locate it.

Answer №2

Considering potential ID obfuscation caused by naming containers, is MainContent_arFrom_HiddenAge the accurate id on the client for HiddenAgeID?

Examining the UpdatePanel's ID, should the HiddenAge's id be 

ctl00_MainContent_arFrom_HiddenAge
?

Answer №3

After extensive investigation, it has become clear that the issue at hand is a bug in Internet Explorer. This unexpected behavior cannot be intentional and I am confident that it is indeed a bug. Despite trying various solutions such as rearranging JavaScript function arguments and restarting Internet Explorer, Visual Studio, and my computer multiple times, the problem persists.

As a temporary solution, I have resorted to embedding the entire function's code directly into the onclick event attribute, resulting in unnecessary repetition of code across every page of my website. This workaround will increase the download size for users until a more efficient solution can be implemented.

Is there a way to bring this issue to the attention of the appropriate bug report team? Providing them with a link or pointer to this discussion may facilitate a resolution to improve the product. While unsure if this is a Visual Studio or Internet Explorer issue, both parties should address the concern. I am willing to assist in replicating the problem to aid in resolving it. Thank you to everyone for your assistance.

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