function dallowDrop(ev) {
    ev.stopPropagation();
}

#div1, #div2 {
    float: left;
    width: 100px;
    height: 600px;
    margin: 10px;
    padding: 10px;
    border: 1px solid black;
}

<div id="div1" ondrop="drop(event)" ondragover="allowDrop(event)">
  <img src="http://wowslider.com/images/features/live-preview.png" draggable="true" ondragstart="drag(event)" id="drag1" width="88" height="31">
  <img src="https://media.licdn.com/mpr/mpr/shrink_100_100/AAEAAQAAAAAAAAZ4AAAAJDA5MGRhMTU5LWE5NDMtNDUwZS1iOGE2LWYwYzhlNmQ2NjRhMg.png" draggable="true" ondragstart="drag(event)" id="drag2" width="88" height="31">
  <img src="http://static.memrise.com/uploads/category_photos/en.png" draggable="true" ondragstart="drag(event)" id="drag3" width="88" height="31">
  <img src="https://yt3.ggpht.com/-Gb2QKmI1WUo/AAAAAAAAAAI/AAAAAAAAAAA/jSPt8M6AM4g/s100-c-k-no-mo-rj-c0xffffff/photo.jpg" draggable="true" ondragstart="drag(event)" id="drag4" width="88" height="31">
</div>

<div id="div2" ondrop="drop(event)" ondragover="allowDrop(event)"></div>

function allowDrop(ev) {
    ev.preventDefault();
}

function drag(ev) {
    ev.dataTransfer.setData("text", ev.target.id);
}

function drop(ev) {
    ev.preventDefault();
    var data = ev.dataTransfer.getData("text");
    ev.target.appendChild(document.getElementById(data));
}