HTML: Is it possible to have a FORM tag in each TABLE ROW in a XHTML valid way?

I had a similar question and this answer in question HTML: table of forms? solved it for me. (Not sure if it is XHTML, but it works in an HTML5 browser.)

You can use css to give table layout to other elements.

.table { display: table; } 
.table>* { display: table-row; }
.table>*>* { display: table-cell; }

Then you use the following valid html.

<div class="table"> 
    <form>
        <div>snake<input type="hidden" name="cartitem" value="55"></div>
        <div><input name="count" value="4" /></div>
    </form>
</div>

It's worth mentioning that this is possible in HTML5, using the "form" attribute for input elements:

<table>
    <tr>
        <td>Id</td>
        <td>Name</td>
        <td>Description</td>
        <td>&nbsp;</td>
    </tr>
    <tr>
        <td><form id="form1"><input type="hidden" name="id" value="1" /></form></td>
        <td><input form="form1" type="text" name="name" value="Name" /></td>
        <td><input form="form1" type="text" name="description" value="Description" /></td>
        <td><input form="form1" type="submit" value="Save" /></td>
    </tr>
    <tr>
        <td><form id="form2"><input type="hidden" name="id" value="1" /></form></td>
        <td><input form="form2" type="text" name="name" value="Name" /></td>
        <td><input form="form2" type="text" name="description" value="Description" /></td>
        <td><input form="form2" type="submit" value="Save" /></td>
    </tr>
</table>

While clean in its lack of JS and use of original elements, unfortunately this isn't working in IE10.

I wrote the below over ten years ago, when the world was a different place. These days I know of many ways to crack this particular nut, but a quick and dirty solution that will validate is to do much the same but use CSS tables for layout, not a regular HTML table.

I'd say you can, although it doesn't validate and Firefox will re-arrange the code (so what you see in 'View generated source' when using Web Developer may well surprise). I'm no expert, but putting

<form action="someexecpage.php" method="post">

just ahead of the

<tr>

and then using

</tr></form>

at the end of the row certainly gives the functionality (tested in Firefox, Chrome and IE7-9). Working for me, even if the number of validation errors it produced was a new personal best/worst! No problems seen as a consequence, and I have a fairly heavily styled table. I guess you may have a dynamically produced table, as I do, which is why parsing the table rows is a bit non-obvious for us mortals. So basically, open the form at the beginning of the row and close it just after the end of the row.

You can't. Your only option is to divide this into multiple tables and put the form tag outside of it. You could end up nesting your tables, but this is not recommended:

<table>
  <tr><td><form>
    <table><tr><td>id</td><td>name</td>...</tr></table>
  </form></td></tr>
</table>

I would remove the tables entirely and replace it with styled html elements like divs and spans.