For some reason I'm getting a scripting error when I select a different
value on my radio button. I'm using an event like this:

private void RadioButtonList1_SelectedIndexChanged(object sender,
System.EventArgs e)
{
	switch (RadioButtonList1.SelectedIndex)
	{
		case 0:
			Label1.Enabled = true;
			Label2.Enabled = true;
			Label3.Enabled = true;
			ddSizes.Enabled = true;
			txtQnty.Enabled = true;
			break;
		case 1:
			Label1.Enabled = false;
			Label2.Enabled = false;
			Label3.Enabled = false;
			ddSizes.Enabled = false;
			txtQnty.Enabled = false;
			break;
	}
}

Does this code create some type of Javascript in the page when it is run
so that the page does a post back? Why isn't it working?