a.linkopacity img {
filter:alpha(opacity=75);
-moz-opacity: 0.5; 
opacity: 0.5;
-khtml-opacity: 0.5;}


a.linkopacity:hover img {
filter:alpha(opacity=100);   
-moz-opacity: 1.0;   
opacity: 1.0;
-khtml-opacity: 1.0; }