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HTML

CSS

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JavaScript

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HTML

              
                <!DOCTYPE html>
<html lang="fr">
<head>
    <meta charset="UTF-8">
    <title>Galerie de Photos JavaScript</title>
    <link rel="stylesheet" href="css/style.css">
    <script src = "js/gallery.js"></script>
</head>
<body>

<div id = "image">
    Survole une image en-dessous pour l'afficher ici.
</div>

<img class="preview" alt="Stylé avec son Bandana" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/389177/bacon.jpg" onmouseover="upDate(this)" onmouseout="unDo()">


<img class = "preview" alt = "Avec mon gosse" src = "https://s3-us-west-2.amazonaws.com/s.cdpn.io/389177/bacon2.JPG" onmouseover = "upDate(this)" onmouseout = "unDo()">

<img class = "preview" src = "https://s3-us-west-2.amazonaws.com/s.cdpn.io/389177/bacon3.jpg" alt = "Petit Chiot" onmouseover = "upDate(this)" onmouseout = "unDo()">

</body>
</html>
              
            
!

CSS

              
                /*Nommez ce fichier externe style.css*/

body{
    margin: 2%;
    border: 1px solid black;
    background-color: #b3b3b3;
}
#image{
    line-height:650px;
    width: 575px;
    height: 650px;
    border:5px solid black;
    margin:0 auto;
    background-color: #8e68ff;
    background-image: url('');
    background-repeat: no-repeat;
    color:#FFFFFF;
    text-align: center;
    background-size: 100%;
    margin-bottom:25px;
    font-size: 150%;
}
.preview{
    width:10%;
    margin-left:17%;
    border: 10px solid black;
}
img{
    width:95%;
}
              
            
!

JS

              
                /* Nommez ce fichier externe gallery.js*/

/* la fonction va changer l'image vers l'original et le texte vers celui présent dans la div d'origine */

function upDate(imgPrev){
      document.getElementById('image').style.backgroundImage = "url("+imgPrev.src+")";
        document.getElementById('image').innerHTML = imgPrev.alt;

}


/* function unDo()
Dans cette fonction {

1) Mettez à jour l'URL vers l'image d'arrière plan de la div avec id = "image"
vers l'image originale. Vous pouvez utiliser le code css poru voir quelle était l'URL originale

2) Changez le texte de la div avec l'id = "image" de retour vers le texte original. Vous pouvez utiliser le code html poru voir quel était le texte original
}

*/


function unDo(){

document.getElementById('image').innerHTML = "Survole une image en-dessous pour l'afficher ici";
        document.getElementById('image').style.backgroundImage = "url('')";

}


              
            
!
999px

Console