<style>   .qmw {  -webkit-transition: all 1s ease;     -moz-transition: all 1s ease;       -o-transition: all 1s ease;      -ms-transition: all 1s ease;          transition: all 1s ease;} .qmw:hover {  -webkit-filter: grayscale(100%);}   </style>      <div class="qmw pic">  <img src="http://www.novickiy.ru/_ph/1/2/590704286.jpg?1417020303" alt="sea"></div>