.opacity {
-moz-transition: all 0.4s; 
-webkit-transition: all 0.4s;  
-ms-transition: all 0.4s;  
-o-transition: all 0.4s;  
transition: all 0.4s; 
opacity:1;
filter:alpha(opacity=75);
}

.opacity:hover {
opacity:0;
filter:alpha(opacity=100);
}

.clarity {
-moz-transition: all 0.5s ease; 
-webkit-transition: all 0.5s ease;  
-ms-transition: all 0.5s ease;  
-o-transition: all 0.5s ease; 
opacity:1;
filter:alpha(opacity=100);   
}

.clarity:hover {
-moz-transition: all 0.5s ease; 
-webkit-transition: all 0.5s ease;  
-ms-transition: all 0.5s ease;  
-o-transition: all 0.5s ease;  
transition: all 0.5s ease; 
opacity:0;
filter:alpha(opacity=0);
}