Best way to identify an element for jQuery interaction

Question

Say I have a table of items and I want to add to every row a button to delete that item. Items come from a database, so they have an unique ID. In the jQuery function I have to retrieve the ID of said item so that I can open a confirm box and eventually redirect the browser to the delete page (nevermind security checks, it's for internal use).

Where in the markup is it better to place the ID?

Answer 1

I think it's better to place an id as a part of row's id:

....
<tr id="item_3">...<td>delete tag</td></tr>
<tr id="item_4">...<td>delete tag</td></tr>
<tr id="item_5">...<td>delete tag</td></tr>
....

And then in jQuery get an id using simple regex.

Update: Or, just put it into rel attribute of a delete button/anchor.

Update 2: Since regex may slow down jQuery performance in this case, try to put id's as rel attribute of each row.