javascript flip img

.f1_container {
    position: relative;
    margin:10px;
    width: 450px;
    height: 281px;
    z-index : 1;
    float:left;
}
.f1_container {
    -webkit-perspective: 1000;
    perspective: 1000;
}
.f1_card {
    width: 100%;
    height: 100%;
    -webkit-transform-style: preserve-3d;
    -webkit-transition: all 1.0s linear;
    transform-style: preserve-3d;
    transition: all 1.0s linear;
}
.f1_container.active .f1_card {
    -webkit-transform: rotateY(180deg);
    transform: rotateY(180deg);
    box-shadow: -5px 5px 5px #aaa;
}
.face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}
.face.back {
    display: block;
    -webkit-transform: rotateY(180deg);
    transform: rotateY(180deg);
    box-sizing: border-box;
    color: white;
    text-align: center;
    background-color: #aaa;
}

  /* The flip box container - set the width and height to whatever you want. We 
  have added the border property to demonstrate that the flip itself goes out of 
  the box on hover (remove perspective if you don't want the 3D effect */
.flip-box {
  background-color: transparent;
  width: 300px;
  
  height: 200px;
  border: 1px solid #f1f1f1;
  perspective: 
  1000px; /* Remove this if you don't want the 3D effect */
}

/* This 
  container is needed to position the front and back side */

  .flip-box-inner {
  position: relative;
  width: 100%;
  
  height: 100%;
  text-align: center;
  transition: transform 
  0.8s;
  transform-style: preserve-3d;
}

/* Do an horizontal 
  flip when you move the mouse over the flip box container */
.flip-box:hover .flip-box-inner {
  
  transform: rotateY(180deg);
}

/* Position the front and back side */
.flip-box-front, .flip-box-back {
  
  position: absolute;
  width: 100%;
  height: 100%;
  
  -webkit-backface-visibility: hidden; /* Safari */
  
  backface-visibility: hidden;
}

/* Style the front side (fallback if 
  image is missing) */
.flip-box-front {
  background-color: #bbb;
  
  color: black;
}

/* Style the back side */
.flip-box-back {
  background-color: dodgerblue;
  
  color: white;
  transform: rotateY(180deg);
} 

  <div class="flip-box">
  <div class="flip-box-inner">
    
  <div class="flip-box-front">
      <img src="img_paris.jpg" 
  alt="Paris" style="width:300px;height:200px">
    </div>
    <div 
  class="flip-box-back">
      <h2>Paris</h2>
      
  <p>What an amazing city</p>
    
  </div>
  </div>
</div> 

<div class="f1_container">
    <div class="shadow f1_card">
        <div class="front face">
            <img src="http://media-cdn.tripadvisor.com/media/photo-s/03/48/0b/14/dolphin-view-chalets.jpg" style="height: 281px; width: 450px;" />
        </div>
        <div class="back face center">
            <img src="http://media-cdn.tripadvisor.com/media/photo-s/03/48/0b/14/dolphin-view-chalets.jpg" style="height: 281px; width: 450px;" />
        </div>
    </div>
</div>