问当鼠标悬停在图像上时，如何突出显示该图像？

EN

    #container{
        position: relative;
        width: 687px;
        height: 612px;
    }
    #main_image img{
        width: 100%;
        height: 100%;
        background: #03CE7B;
    }
    #nutrition_icon img{
        position: absolute;
        bottom: 369px;
        right: 300px;
    }

    #nutrition_icon_text
    {
        position:absolute;    
        color:white;
        font-size:22px;
        font-weight:bold;
        left:230px;
        bottom:435px;
    }

    #wrap {
        position:relative; 
        width: 200px;  
        height: 145px;
        border: 1px solid grey
    }

    .nutrition_cover {
        height: 200px;
        width: 180px;
        position: absolute;
        top: 30px;
        left: 200px;
        background: rgba(0,0,0,.7);
        display:none;
    }

    /*#nutrition_icon:hover .nutrition_cover {
        display:block;    
    }*/
    #nutrition_icon img:hover
    {
       -webkit-filter: grayscale(100%); /* Safari 6.0 - 9.0 */
        filter: grayscale(100%);
    }

    <div id="container">
      <div id="main_image">
        <div class="tve_image_caption thrv_wrapper"><span class="tve_image_frame">
        <img src="http://www.cliniquevi.com/templates/clinique-vi/images/alveoles.png" alt="" class="" width="687"             height="612"></span></div>
        </div>
      <div id="nutrition_icon">
        <a href="http://vi.kmmagency.com/services/nutrition/1-2/" class="tveeee_active_hyperlink">
          <img src="http://www.cliniquevi.com/templates/clinique-vi/images/alveole-nutrition.png" alt="">  
        </a>
        <div class="nutrition_cover"></div>
      </div>
    </div>

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<img src="yourimage.gif" width="96" height="134" style="filter:alpha(opacity=100);-moz-opacity:1" onMouseover="makevisible(this,0)" onMouseout="makevisible(this,1)">