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questions about tfoot and content order

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From: tee
Date: Dec 13, 2010 7:42AM

Quote the spec:

The TFOOT element defines a group of footer rows in a table. A TABLE may have one TFOOT, which must follow the optional THEADand precede the required TBODY.


I have a shopping cart with following markups.

[h1] Shipping Cart

------------------------------------------------
tabular data
<table summary="items in the shopping cart">
<thead>
<tr>
<th>
............ content

<tfoot>
<tr>
<td>[button] update cart [button] continue shopping</td>

<tbody>
<tr>
<td>............ content


------------------------------------------------

[h2] discount code
............ content

------------------------------------------------
tabular data

<table summary="tax and subtotal details">
<tfoot>
<tr>
<th>
<tbody>
<tr>
<td>

------------------------------------------------

[button] checkout


[h2] Estimate Shipping & Tax
............ content

[h2] cross-sell
...cross-sell items


Testing from VoiceOver, as expected, it reads content in the tfoot first before tbody.

Question 1: Will it be confusing for screen reader user?

Question 2: This is more a usability issue than accessibility that I am concerned with. Do screen reader users find it more accessible if the "Estimate Shipping & Tax" and "cross-sell" place above the "Checkout" button?

Thanks!
tee