<[^>]*\n?.*=("|')?(.*\.jpg)("|')?.*\n?[^<]*>
Matches: [<td background="../img/img.jpg" >], [<img src=img.jpg >], [<img src='img.jpg']
Matches: [<td background="../img/img.jpg" >], [<img src=img.jpg >], [<img src='img.jpg']
<[^>]*\n?.*=("|')?(.*\.jpg)("|')?.*\n?[^<]*>
Matches: [<td background="../img/img.jpg" >], [<img src=img.jpg >], [<img src='img.jpg']