Duplicate image border

Hi

I'm trying to make a songchart Top 20 list and use image arrows to mark when a song goes up or down in the charts. Problem is that the image border repeats itself for as many instances of the image there is on the page.

To be clearer, here's a link:

http://1001.com.do/index.php?option=com_content&view=article&id=234:testing

As you can see, there are three green arrows, so the border repeats three times. Two red arrows, so the border repeats two times. One blue arrow, so there's only one border.

Can anybody help me with that?

Thanks in advance.

Checking your website with firefox i cannot see any borders, can you please take a screenshot so we can see , please also write which browser you are using.

See you around...