Please note that while working on this problem I have removed all spaces from your paths and filenames because spaces are bad practise so take this into consideration when referring to them.
Using this latter method you can change the position of all the images by changing the values of 'wint' and 'winl' in this one place while leaving the rest of the code alone.
I forgot to mention that your first thumbnail actually opens the wrong picture. It shows poison26.jpg instead of poison003.jpg. The correct page is loaded (poison003.htm) but that page has the wrong title and refers to the wrong image.