hover logo

<div class="container">

  <div class="logo">

<img src="https://lh4.googleusercontent.com/-k-I7wd6vqRU/UW7ED4PubgI/AAAAAAAATMM/7oI_Sf-nQCU/h120/bold.png" alt="b" />

    <a href="http://www.digitalhubinc.com/"><img src="https://lh4.googleusercontent.com/-k-I7wd6vqRU/UW7ED4PubgI/AAAAAAAATMM/7oI_Sf-nQCU/h120/bold.png" alt="b" /></a>

    </div>

</div>

.container {

    width: 300px;

    margin: 250px auto;

}

.logo {

  float:left

  }

  .logo a {

  opacity:0.4;

filter:alpha(opacity=40);

  }

  .logo a:hover {

  opacity:1.0;

filter:alpha(opacity=40);

  }