Make badge background transparent

Author: mokun

index.html

@@ -571,9 +571,9 @@ <h3>B. Changes/Improvements in v3.07</h3>
 
 							<footer class="container" > 
 
-								<a href="https://sourceforge.net/p/mars-sim/" rel="nofollow"><img width="200px" src="https://sourceforge.net/sflogo.php?type=16&group_id=3286"/></a>
+								<a href="https://sourceforge.net/p/mars-sim/" rel="nofollow"><img width="300px" src="https://sourceforge.net/sflogo.php?type=16&group_id=3286" alt="mars-sim at SourceForge" style="opacity:0.4;filter:alpha(opacity=40);/></a>
 								<br/><br/>
-								<a href="https://github.com/mars-sim/mars-sim/" rel="nofollow"><img width="200px" src="https://assets-cdn.github.com/images/modules/logos_page/GitHub-Mark.png"/></a>
+								<a href="https://github.com/mars-sim/mars-sim/" rel="nofollow"><img width="300px" src="https://assets-cdn.github.com/images/modules/logos_page/GitHub-Mark.png" alt="mars-sim at GitHub" style="opacity:0.4;filter:alpha(opacity=40);/></a>
 								<br/><br/>
 								<script src='https://www.openhub.net/p/mars-sim-git/widgets/project_factoids?format=js'></script>
 							</footer>