How to remove the border between two images?
Comment out the line break between them.
<img src="/static/btnNext.gif" border="0" /><!--
--><img src="/static/btnSave.gif" border="0" />
Why? HTML allows so many spaces (both breaking and not) to format the code, but it only displays the first. In your case, images located on different lines are interpreted as the space between them. The simplest solution is to put them on one line, but this is not so readable.
Remove spaces between tags imgand use cssvertical-align:top
HTML:
<img src='http://i.imgur.com/wipljF1.png'/>NoSpaces<img src='http://i.imgur.com/wipljF1.png' class='playerpreviewbig'/>NoSpaces<img src='http://i.imgur.com/wipljF1.png' class='playerpreviewbig'/>
CSS
img {
width: 50px;
height: 50px;
padding: 0;
margin: 0;
vertical-align:top;
}