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Retrieve Hiddenfield Value after Javascript CHange

Hi,.

I am using Hiddenfields to push data from a webpage into the code behind, but have an issue as one field works and one doesn't.

The hiddenfields are

<asp:HiddenField ID="HiddenFieldballoona" runat="server" value="" />
<asp:HiddenField ID="HFballoonadesc" runat="server" value="" />

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and the javascript is

function changeballoon(x,desc,rib)
{
document.getElementById('<%= HiddenFieldballoona.ClientID%>').value = "Balloon"+[x]+".png";
document.getElementById('<%= HFballoonadesc.ClientID%>').value = [desc];
}

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and behind the scenes I am then using

HiddenFieldballoona.Value

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It will quite happily pull the HFballoonadesc into the code behind after, but not HiddenFieldballoona - this will stay as whatever was loaded into it on page load.

Any ideas welcome?

Cheers
Karl

Karl Blackburn

ASKER

That parts work either way, I believe it was wrapped as originally I added text either side.

Its the

document.getElementById('<%= HiddenFieldballoona.ClientID%>').value = "Balloon"+[x]+".png";

That does exactly the same thing, but when I try to pull from it code behind will always default to the original value when the page was loaded.

Gary

Are you sure values a,desc,rib are being passed to the function
If you change to text not hidden are the values inserted?

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Karl Blackburn

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Julian Hansen

That does exactly the same thing, but when I try to pull from it code behind will always default to the original value when the page was loaded.

Just to clarify - once the page is rendered you can't access the ASP vars any more.

When you say "pull from the code behind" - where are you doing that?

Karl Blackburn

ASKER

Managed to find the answer