iframe#tumblr_controls { 
right:3px !important; 
position: fixed !important; 
filter:alpha(opacity=70); 
-moz-opacity:0.70; 
opacity:0.70; 
-webkit-transition-duration: 0.7s; 
-moz-transition-duration: 0.7s; 
transition-duration: 0.7s;
}

iframe#tumblr_controls:hover{
filter:alpha(opacity=100); 
-moz-opacity:1; opacity:1;
}