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Passing a javascript value to a code behind page

How would you pass a javascript value back to a code behind page in asp.net, such as:

FROM: (onclick function...)
rbRecurEventValue.value = 1

TO CODE BEHIND:

Public rbRecurEventValue as Integer

If rbRecurEventValue = 1 Then
[do something]
End if

I'm receiving a value of 0 when passing it to the code behind page.

Thanks.

ASKER CERTIFIED SOLUTION

the_paab

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barnesco

ASKER

The javascript part makes sense, but label1 isn't an aspx control--it's an html element. How would the above code work then? Thanks.

barnesco

ASKER

I see what you're doing now--passing it to a hidden field, then passing it to the code behind variable, but I might be missing something. I have:

in javascript:
document.getElementById("lblRecurEvent").value=1;

in aspx:
<asp:Label ID="lblRecurEvent" runat="server" style="display:none;"></asp:Label>

in code behind:

RecurEvent = lblRecurEvent.Text
If RecurEvent = 1 Then
[do something]
End if

Where is going wrong? Thanks.

barnesco

ASKER

It seems the value is not being set with document.getElementById("lblRecurEvent").value=1.

I've tried document.getElementById("lblRecurEvent").text=1, but that doesn't work, either.

barnesco

ASKER

The question now is how do you assign a javascript value to an aspx control?

barnesco

ASKER

Finally figured it out on two fronts:

First have to declare the variable, then assign the value as in:

var elemRecurValue = document.getElementById("varname")
elemRecurValue.value=1

Second, and this is the one that took all %$^&* day to figure out: You can't assign a value to a label using javascript!!! For some dumb reason, it just won't work. It will for a textbox, so I used a textbox hidden field, and yes, it works.

the_paab

Sorry about the Label you are right it must be TextBox.