Rather than using

container[i].name == 'lblQuestionType'

you will need to pass the ClientID property of the label into your javascript function and test against the id not name property which may not be present.

Take a look at the source html being generated for your page and you will see what is being used for the name (if present) and the id attributes of the span.

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Bill, WESNet Designs
Team Lead - DotNetNuke Gallery Module Project (Not Actively Being Developed)
Extensions Forge Projects . . .
Current: UserExport, ContentDeJour, ePrayer, DNN NewsTicker, By Invitation
Coming Soon: FRBO-For Rent By Owner

What Bill say that you can view the source file and try looking for the label id name.

I even find a better way, if you lazy to find the id in the source code. On your javascript you can use this

if  ( container[i].name.indexOf('lblQuestionType')>0){

//perform your action here
}

The drawbacks is you have to use a for loop.

Another quick solution: you can declare a variable for javascript in the page load
something like this

lblScript.Text = " var labelID = '" & lblQuestionType.Text & "'"  (this is only partial codes)

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Cheers
Andy