"Simple Responsive Image Gallery"
Bootstrap 3.1.0 Snippet by raphaelfb

<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <body> <div class="page-header"> <h1>Example page header <small>Subtext for header</small></h1> </div> <div class="container"> <div class="row"> <div class="col-md-3 col-sm-4 col-xs-6"><img class="img-responsive" src="http://2.bp.blogspot.com/-H6MAoWN-UIE/TuRwLbHRSWI/AAAAAAAABBk/89iiEulVsyg/s400/Free%2BNature%2BPhoto.jpg" /></div> <div class="col-md-3 col-sm-4 col-xs-6"><img class="img-responsive" src="http://www.virginia.org/uploadedImages/virginiaorg/Images/OrgImages/H/HamptonConventionVisitorBureau/Grandview_Nature_Preserve.jpg?width=300&height=200&scale=upscalecanvas" /></div> <div class="col-md-3 col-sm-4 col-xs-6"><img class="img-responsive" src="http://blog.arborday.org/wp-content/uploads/2013/02/NEC1-300x200.jpg" /></div> <div class="col-md-3 col-sm-4 col-xs-6"><img class="img-responsive" src="http://th03.deviantart.net/fs70/200H/f/2010/256/0/9/painting_of_nature_by_dhikagraph-d2ynalq.jpg" /></div> </div> </div> <hr> <footer> <p>© Company 2013</p> </footer> </body>
img { filter: gray; /* IE6-9 */ -webkit-filter: grayscale(1); /* Google Chrome, Safari 6+ & Opera 15+ */ -webkit-box-shadow: 0px 2px 6px 2px rgba(0,0,0,0.75); -moz-box-shadow: 0px 2px 6px 2px rgba(0,0,0,0.75); box-shadow: 0px 2px 6px 2px rgba(0,0,0,0.75); margin-bottom:20px; } img:hover { filter: none; /* IE6-9 */ -webkit-filter: grayscale(0); /* Google Chrome, Safari 6+ & Opera 15+ */ }

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