title: How to change "image" in OpenCart header depending on device resolution
body: <p>I have a problem with changing "image" in OpenCart header depending on device resolution. For example, when I check this home page on desktop resolution I have the following link to my header image <code>image/catalog/header_v6.png</code>. Could you help me please to change image when I view this page below desktop resolution? I read <a href="https://stackoverflow.com/questions/25482765/bootstrap-change-image-according-to-device">this thread</a> with similar issue, but it didn't work.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="true" data-console="true" data-babel="false">
  <div class="snippet-code snippet-currently-hidden">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>body {
   font-family: 'Open Sans', sans-serif;
   font-weight: 400;
   color: #666;
   font-size: 12px;
   line-height: 20px;
   width: 100%;
  }
  h1, h2, h3, h4, h5, h6 {
   color: #444;
  }
  /* default font size */
  .fa {
   font-size: 14px;
  }
  /* Override the bootstrap defaults */
  h1 {
   font-size: 33px;
  }
  h2 {
   font-size: 27px;
  }
  h3 {
   font-size: 21px;
  }
  h4 {
   font-size: 15px;
  }
  h5 {
   font-size: 12px;
  }
  h6 {
   font-size: 10.2px;
  }
  a {
   color: #23a1d1;
  }
  a:hover {
   text-decoration: none;
  }
  legend {
   font-size: 18px;
   padding: 7px 0px
  }
  label {
   font-size: 12px;
   font-weight: normal;
  }
  select.form-control, textarea.form-control, input[type="text"].form-control, input[type="password"].form-control, input[type="datetime"].form-control, input[type="datetime-local"].form-control, input[type="date"].form-control, input[type="month"].form-control, input[type="time"].form-control, input[type="week"].form-control, input[type="number"].form-control, input[type="email"].form-control, input[type="url"].form-control, input[type="search"].form-control, input[type="tel"].form-control, input[type="color"].form-control {
   font-size: 12px;
  }
  .input-group input, .input-group select, .input-group .dropdown-menu, .input-group .popover {
   font-size: 12px;
  }
  .input-group .input-group-addon {
   font-size: 12px;
   height: 30px;
  }
  /* Fix some bootstrap issues */
  span.hidden-xs, span.hidden-sm, span.hidden-md, span.hidden-lg {
   display: inline;
  }
  
  .nav-tabs {
   margin-bottom: 15px;
  }
  div.required .control-label:before {
   content: '* ';
   color: #F00;
   font-weight: bold;
  }
  /* Gradent to all drop down menus */
  .dropdown-menu li &gt; a:hover {
   text-decoration: none;
   color: #ffffff;
   background-color: #229ac8;
   background-image: linear-gradient(to bottom, #23a1d1, #1f90bb);
   background-repeat: repeat-x;
  }
  /* top */
  #top {
   background-color: #EEEEEE;
   border-bottom: 1px solid #e2e2e2;
   padding: 4px 0px 3px 0;
   margin: 0 0 20px 0;
   min-height: 40px;
  }
  #top .container {
   padding: 0 20px;
  }
  #top #form-currency .currency-select,
  #top #form-language .language-select {
   text-align: left;
  }
  #top #form-currency .currency-select:hover,
  #top #form-language .language-select:hover {
   text-shadow: none;
   color: #ffffff;
   background-color: #229ac8;
   background-image: linear-gradient(to bottom, #23a1d1, #1f90bb);
   background-repeat: repeat-x;
  }
  #top .btn-link, #top-links li, #top-links a {
   color: #888;
   text-shadow: 0 1px 0 #FFF;
   text-decoration: none;
  }
  #top .btn-link:hover, #top-links a:hover {
   color: #444;
  }
  #top-links .dropdown-menu a {
   text-shadow: none;
  }
  #top-links .dropdown-menu a:hover {
   color: #FFF;
  }
  #top .btn-link strong {
   font-size: 14px;
          line-height: 14px;
  }
  #top-links {
   padding-top: 6px;
  }
  #top-links a + a {
   margin-left: 15px;
  }
  /* logo */
  #logo {
   margin: 0 0 10px 0;
  }
  
  .img-responsive{
   
   margin: 0 auto;
   
   }
  
  
  /* search */
  #search {
   margin-bottom: 10px;
  }
  #search .input-lg {
   height: 40px;
   line-height: 20px;
   padding: 0 10px;
  }
  #search .btn-lg {
   font-size: 15px;
   line-height: 18px;
   padding: 10px 35px;
   text-shadow: 0 1px 0 #FFF;
  }
  /* cart */
  #cart {
   margin-bottom: 10px;
   margin-top: 15px;
  }
  #cart &gt; .btn {
   font-size: 12px;
   line-height: 18px;
   color: #FFF;
  }
  #cart.open &gt; .btn {
   background-image: none;
   background-color: #FFFFFF;
   border: 1px solid #E6E6E6;
   color: #666;
   box-shadow: none;
   text-shadow: none;
  }
  #cart.open &gt; .btn:hover {
   color: #444;
  }
  #cart .dropdown-menu {
   background: #eee;
   z-index: 1001;
  }
  #cart .dropdown-menu {
   min-width: 100%;
  }
  @media (max-width: 478px) {
   #cart .dropdown-menu {
    width: 100%;
   }
  }
  #cart .dropdown-menu table {
   margin-bottom: 10px;
  }
  #cart .dropdown-menu li &gt; div {
   min-width: 427px;
   padding: 0 10px;
  }
  @media (max-width: 478px) {
   #cart .dropdown-menu li &gt; div {
    min-width: 100%;
   }
  }
  #cart .dropdown-menu li p {
   margin: 20px 0;
  }
  /* menu */
  #menu {
   background-color: #229ac8;
   background-image: linear-gradient(to bottom, #23a1d1, #1f90bb);
   background-repeat: repeat-x;
   border-color: #1f90bb #1f90bb #145e7a;
   min-height: 40px;
  }
  #menu .nav &gt; li &gt; a {
   font-family: 'Lato', sans-serif;
   font-weight:400;
   
   font-size:18px;
   color: #fff;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
   padding: 10px 35px 10px 35px;
   min-height: 15px;
   background-color: transparent;
  }
  #menu .nav &gt; li &gt; a:hover, #menu .nav &gt; li.open &gt; a {
   background-color: rgba(0, 0, 0, 0.1);
  }
  #menu .dropdown-menu {
   padding-bottom: 0;
  }
  #menu .dropdown-inner {
   display: table;
  }
  #menu .dropdown-inner ul {
   display: table-cell;
  }
  #menu .dropdown-inner a {
   min-width: 160px;
   display: block;
   padding: 3px 20px;
   clear: both;
   line-height: 20px;
   color: #333333;
   font-size: 12px;
  }
  #menu .dropdown-inner li a:hover {
   color: #FFFFFF;
  }
  #menu .see-all {
   display: block;
   margin-top: 0.5em;
   border-top: 1px solid #DDD;
   padding: 3px 20px;
   -webkit-border-radius: 0 0 4px 4px;
   -moz-border-radius: 0 0 4px 4px;
   border-radius: 0 0 3px 3px;
   font-size: 12px;
  }
  #menu .see-all:hover, #menu .see-all:focus {
   text-decoration: none;
   color: #ffffff;
   background-color: #229ac8;
   background-image: linear-gradient(to bottom, #23a1d1, #1f90bb);
   background-repeat: repeat-x;
  }
  #menu #category {
   float: left;
   padding-left: 15px;
   font-size: 16px;
   font-weight: 700;
   line-height: 40px;
   color: #fff;
   text-shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
  }
  #menu .btn-navbar {
   font-size: 15px;
   font-stretch: expanded;
   color: #FFF;
   padding: 2px 18px;
   float: right;
   background-color: #229ac8;
   background-image: linear-gradient(to bottom, #23a1d1, #1f90bb);
   background-repeat: repeat-x;
   border-color: #1f90bb #1f90bb #145e7a;
  }
  #menu .btn-navbar:hover, #menu .btn-navbar:focus, #menu .btn-navbar:active, #menu .btn-navbar.disabled, #menu .btn-navbar[disabled] {
   color: #ffffff;
   background-color: #229ac8;
  }
  @media (min-width: 768px) {
   #menu .dropdown:hover .dropdown-menu {
    display: block;
   }
  }
  @media (max-width: 767px) {
   #menu {
    border-radius: 4px;
   }
   #menu div.dropdown-inner &gt; ul.list-unstyled {
    display: block;
   }
   #menu div.dropdown-menu {
    margin-left: 0 !important;
    padding-bottom: 10px;
    background-color: rgba(0, 0, 0, 0.1);
   }
   #menu .dropdown-inner {
    display: block;
   }
   #menu .dropdown-inner a {
    width: 100%;
    color: #fff;
   }
   #menu .dropdown-menu a:hover,
   #menu .dropdown-menu ul li a:hover {
    background: rgba(0, 0, 0, 0.1);
   }
   #menu .see-all {
    margin-top: 0;
    border: none;
    border-radius: 0;
    color: #fff;
   }
  }
  /* content */
  #content {
   min-height: 600px;
  }
  /* footer */
  footer {
   margin-top: 30px;
   padding-top: 30px;
   background-color: #303030;
   border-top: 1px solid #ddd;
   color: #e2e2e2;
  }
  footer hr {
   border-top: none;
   border-bottom: 1px solid #666;
  }
  footer a {
   color: #ccc;
  }
  footer a:hover {
   color: #fff;
  }
  footer h5 {
   font-family: 'Open Sans', sans-serif;
   font-size: 13px;
   font-weight: bold;
   color: #fff;
  }
  /* alert */
  .alert {
   padding: 8px 14px 8px 14px;
  }
  /* breadcrumb */
  .breadcrumb {
   margin: 0 0 20px 0;
   padding: 8px 0;
   border: 1px solid #ddd;
  }
  .breadcrumb i {
   font-size: 15px;
  }
  .breadcrumb &gt; li {
   text-shadow: 0 1px 0 #FFF;
   padding: 0 20px;
   position: relative;
   white-space: nowrap;
  }
  .breadcrumb &gt; li + li:before {
   content: '';
   padding: 0;
  }
  .breadcrumb &gt; li:after {
   content: '';
   display: block;
   position: absolute;
   top: -3px;
   right: -5px;
   width: 26px;
   height: 26px;
   border-right: 1px solid #DDD;
   border-bottom: 1px solid #DDD;
   -webkit-transform: rotate(-45deg);
   -moz-transform: rotate(-45deg);
   -o-transform: rotate(-45deg);
   transform: rotate(-45deg);
  }
  .pagination {
   margin: 0;
  }
  /* buttons */
  .buttons {
   margin: 1em 0;
  }
  .btn {
   padding: 7.5px 12px;
   font-size: 12px;
   border: 1px solid #cccccc;
   border-radius: 4px;
   box-shadow: inset 0 1px 0 rgba(255,255,255,.2), 0 1px 2px rgba(0,0,0,.05);
  }
  .btn-xs {
   font-size: 9px;
  }
  .btn-sm {
   font-size: 10.2px;
  }
  .btn-lg {
   padding: 10px 16px;
   font-size: 15px;
  }
  .btn-group &gt; .btn, .btn-group &gt; .dropdown-menu, .btn-group &gt; .popover {
   font-size: 12px;
  }
  .btn-group &gt; .btn-xs {
   font-size: 9px;
  }
  .btn-group &gt; .btn-sm {
   font-size: 10.2px;
  }
  .btn-group &gt; .btn-lg {
   font-size: 15px;
  }
  .btn-default {
   color: #777;
   text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
   background-color: #e7e7e7;
   background-image: linear-gradient(to bottom, #eeeeee, #dddddd);
   background-repeat: repeat-x;
   border-color: #dddddd #dddddd #b3b3b3 #b7b7b7;
  }
  .btn-primary {
   color: #ffffff;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
   background-color: #229ac8;
   background-image: linear-gradient(to bottom, #23a1d1, #1f90bb);
   background-repeat: repeat-x;
   border-color: #1f90bb #1f90bb #145e7a;
  }
  .btn-primary:hover, .btn-primary:active, .btn-primary.active, .btn-primary.disabled, .btn-primary[disabled] {
   background-color: #1f90bb;
   background-position: 0 -15px;
  }
  .btn-warning {
   color: #ffffff;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
   background-color: #faa732;
   background-image: linear-gradient(to bottom, #fbb450, #f89406);
   background-repeat: repeat-x;
   border-color: #f89406 #f89406 #ad6704;
  }
  .btn-warning:hover, .btn-warning:active, .btn-warning.active, .btn-warning.disabled, .btn-warning[disabled] {
   box-shadow: inset 0 1000px 0 rgba(0, 0, 0, 0.1);
  }
  .btn-danger {
   color: #ffffff;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
   background-color: #da4f49;
   background-image: linear-gradient(to bottom, #ee5f5b, #bd362f);
   background-repeat: repeat-x;
   border-color: #bd362f #bd362f #802420;
  }
  .btn-danger:hover, .btn-danger:active, .btn-danger.active, .btn-danger.disabled, .btn-danger[disabled] {
   box-shadow: inset 0 1000px 0 rgba(0, 0, 0, 0.1);
  }
  .btn-success {
   color: #ffffff;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
   background-color: #5bb75b;
   background-image: linear-gradient(to bottom, #62c462, #51a351);
   background-repeat: repeat-x;
   border-color: #51a351 #51a351 #387038;
  }
  .btn-success:hover, .btn-success:active, .btn-success.active, .btn-success.disabled, .btn-success[disabled] {
   box-shadow: inset 0 1000px 0 rgba(0, 0, 0, 0.1);
  }
  .btn-info {
   color: #ffffff;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
   background-color: #df5c39;
   background-image: linear-gradient(to bottom, #e06342, #dc512c);
   background-repeat: repeat-x;
   border-color: #dc512c #dc512c #a2371a;
  }
  .btn-info:hover, .btn-info:active, .btn-info.active, .btn-info.disabled, .btn-info[disabled] {
   background-image: none;
   background-color: #df5c39;
  }
  .btn-link {
   border-color: rgba(0, 0, 0, 0);
   cursor: pointer;
   color: #23A1D1;
   border-radius: 0;
  }
  .btn-link, .btn-link:active, .btn-link[disabled] {
   background-color: rgba(0, 0, 0, 0);
   background-image: none;
   box-shadow: none;
  }
  .btn-inverse {
   color: #ffffff;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
   background-color: #363636;
   background-image: linear-gradient(to bottom, #444444, #222222);
   background-repeat: repeat-x;
   border-color: #222222 #222222 #000000;
  }
  .btn-inverse:hover, .btn-inverse:active, .btn-inverse.active, .btn-inverse.disabled, .btn-inverse[disabled] {
   background-color: #222222;
   background-image: linear-gradient(to bottom, #333333, #111111);
  }
  /* list group */
  .list-group a {
   border: 1px solid #DDDDDD;
   color: #888888;
   padding: 8px 12px;
  }
  .list-group a.active, .list-group a.active:hover, .list-group a:hover {
   color: #444444;
   background: #eeeeee;
   border: 1px solid #DDDDDD;
   text-shadow: 0 1px 0 #FFF;
  }
  /* carousel */
  .carousel-caption {
   color: #FFFFFF;
   text-shadow: 0 1px 0 #000000;
  }
  .carousel-control .icon-prev:before {
   content: '\f053';
   font-family: FontAwesome;
  }
  .carousel-control .icon-next:before {
   content: '\f054';
   font-family: FontAwesome;
  }
  /* product list */
  .product-thumb {
   border: 1px solid #ddd;
   margin-bottom: 20px;
   overflow: auto;
  }
  .product-thumb .image {
   text-align: center;
  }
  .product-thumb .image a {
   display: block;
  }
  .product-thumb .image a:hover {
   opacity: 0.8;
  }
  .product-thumb .image img {
   margin-left: auto;
   margin-right: auto;
  }
  .product-grid .product-thumb .image {
  
   float: none;
  }
  @media (min-width: 767px) {
  .product-list .product-thumb .image {
   float: left;
   padding: 0 15px;
  }
  }
  .product-thumb h4 {
   font-weight: bold;
  }
  .product-thumb .caption {
   padding: 0 20px;
   min-height: 180px;
  }
  .product-list .product-thumb .caption {
   margin-left: 230px;
  }
  @media (max-width: 1200px) {
  .product-grid .product-thumb .caption {
   min-height: 210px;
   padding: 0 10px;
  }
  }
  @media (max-width: 767px) {
  .product-list .product-thumb .caption {
   min-height: 0;
   margin-left: 0;
   padding: 0 10px;
  }
  .product-grid .product-thumb .caption {
   min-height: 0;
  }
  }
  .product-thumb .rating {
   padding-bottom: 10px;
  }
  .rating .fa-stack {
   font-size: 8px;
  }
  .rating .fa-star-o {
   color: #999;
   font-size: 15px;
  }
  .rating .fa-star {
   color: #FC0;
   font-size: 15px;
  }
  .rating .fa-star + .fa-star-o {
   color: #E69500;
  }
  h2.price {
   margin: 0;
  }
  .product-thumb .price {
   color: #444;
  }
  .product-thumb .price-new {
   font-weight: 600;
  }
  .product-thumb .price-old {
   color: #999;
   text-decoration: line-through;
   margin-left: 10px;
  }
  .product-thumb .price-tax {
   color: #999;
   font-size: 12px;
   display: block;
  }
  .product-thumb .button-group {
   border-top: 1px solid #ddd;
   background-color: #eee;
   overflow: auto;
  }
  .product-list .product-thumb .button-group {
   border-left: 1px solid #ddd;
  }
  @media (max-width: 768px) {
   .product-list .product-thumb .button-group {
    border-left: none;
   }
  }
  .product-thumb .button-group button {
   width: 60%;
   border: none;
   display: inline-block;
   float: left;
   background-color: #eee;
   color: #888;
   line-height: 38px;
   font-weight: bold;
   text-align: center;
   text-transform: uppercase;
  }
  .product-thumb .button-group button + button {
   width: 20%;
   border-left: 1px solid #ddd;
  }
  .product-thumb .button-group button:hover {
   color: #444;
   background-color: #ddd;
   text-decoration: none;
   cursor: pointer;
  }
  @media (max-width: 1200px) {
   .product-thumb .button-group button, .product-thumb .button-group button + button {
    width: 33.33%;
   }
  }
  @media (max-width: 767px) {
   .product-thumb .button-group button, .product-thumb .button-group button + button {
    width: 33.33%;
   }
  }
  .thumbnails {
   overflow: auto;
   clear: both;
   list-style: none;
   padding: 0;
   margin: 0;
  }
  .thumbnails &gt; li {
   margin-left: 20px;
  }
  .thumbnails {
   margin-left: -20px;
  }
  .thumbnails &gt; img {
   width: 100%;
  }
  .image-additional a {
   margin-bottom: 20px;
   padding: 5px;
   display: block;
   border: 1px solid #ddd;
  }
  .image-additional {
   max-width: 78px;
  }
  .thumbnails .image-additional {
   float: left;
   margin-left: 20px;
  }
  
  
  
  
  
  
  
  
  
  @media (min-width: 1200px) {
   #content .col-lg-2:nth-child(6n+1),
   #content .col-lg-2:nth-child(6n+1),
   #content .col-lg-3:nth-child(4n+1),
   #content .col-lg-4:nth-child(3n+1),
   #content .col-lg-6:nth-child(2n+1) {
    clear:left;
   }
  }
  @media (min-width: 992px) and (max-width: 1199px) {
   #content .col-md-2:nth-child(6n+1),
   #content .col-md-2:nth-child(6n+1),
   #content .col-md-3:nth-child(4n+1),
   #content .col-md-4:nth-child(3n+1),
   #content .col-md-6:nth-child(2n+1) {
    clear:left;
   }
  }
  @media (min-width: 768px) and (max-width: 991px) {
   #content .col-sm-2:nth-child(6n+1),
   #content .col-sm-2:nth-child(6n+1),
   #content .col-sm-3:nth-child(4n+1),
   #content .col-sm-4:nth-child(3n+1),
   #content .col-sm-6:nth-child(2n+1) {
    clear:left;
   }
  }
  
  /* fixed colum left + content + right*/
  @media (min-width: 768px) {
      #column-left  .product-layout .col-md-3 {
         width: 100%;
      }
  
   #column-left + #content .product-layout .col-md-3 {
         width: 50%;
      }
  
   #column-left + #content + #column-right .product-layout .col-md-3 {
         width: 100%;
      }
  
      #content + #column-right .product-layout .col-md-3 {
         width: 100%;
      }
  }
  
  /* fixed product layouts used in left and right columns */
  #column-left .product-layout, #column-right .product-layout {
   width: 100%;
  }
  
  /* fixed mobile cart quantity input */
  .input-group .form-control[name^=quantity] {
   min-width: 50px;
  }
  
  /* Missing focus and border color to overwrite bootstrap */
  .btn-info:hover, .btn-info:active, .btn-info.active, .btn-info.disabled, .btn-info[disabled] {
      background-image: none;
      background-color: #df5c39;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;header&gt;
    &lt;div class="container"&gt;
      &lt;div class="row"&gt;
        &lt;div class="col-sm-10"&gt;
          &lt;div id="logo"&gt;
            &lt;?php if ($logo) { ?&gt;
            &lt;a href="&lt;?php echo $home; ?&gt;"&gt;&lt;img src="image/catalog/header_v6.png" title="&lt;?php echo $name; ?&gt;" alt="&lt;?php echo $name; ?&gt;" class="img-responsive" /&gt;&lt;/a&gt;
            &lt;?php } else { ?&gt;
            &lt;h1&gt;&lt;a href="&lt;?php echo $home; ?&gt;"&gt;&lt;?php echo $name; ?&gt;&lt;/a&gt;&lt;/h1&gt;
            &lt;?php } ?&gt;
          &lt;/div&gt;
        &lt;/div&gt;
        
        &lt;div class="col-sm-2" &gt;
        
        &lt;div class="row"&gt;&lt;div class="col-sm-12 pull-right"&gt;&lt;?php echo $cart; ?&gt;&lt;/div&gt;&lt;/div&gt;
  
        &lt;div class="row"&gt;&lt;div class="col-sm-12 pull-right"&gt;&lt;?php echo $search; ?&gt;&lt;/div&gt;&lt;/div&gt;
        
      &lt;/div&gt;
    &lt;/div&gt;
  &lt;/header&gt;</code></pre>
  </div>
  </div>
  </p>