PVH / WWW-WebKit2-0.133 / t / test / drag_and_drop.html 
<!DOCTYPE html>
<html>
    <head>
        <title>Drag and drop</title>
        <script>
            var dragme;
            var target;

            window.onload = function() {
                dragme = document.getElementById('dragme');
                target = document.getElementById('target');
                dragme.addEventListener('dragstart', drag_start, false);
                target.addEventListener('dragover',  drag_over,  false);
                target.addEventListener('drop',      drop,       false);
            }

            function drag_start(event) {
                event.dataTransfer.effectAllowed = 'move';
                event.dataTransfer.setData('text/html', 'data');
            }

            function drag_over(event) {
                if (event.preventDefault)
                    event.preventDefault();

                event.dataTransfer.dropEffect = 'move';  // See the section on the DataTransfer object.

                return false;
            }

            function drop(event) {
                event.stopPropagation();
                this.appendChild(dragme.parentNode.removeChild(dragme), this);
                return false;
            }
        </script>
        <style type="text/css">
        </style>
    </head>
    <body>
        <div id="target" style="width: 200px; height: 200px; border: 1px solid red;" dropzone="true">
        </div>
        <div id="source">
            <div id="dragme" style="width: 100px; height: 10px; outline: 1px solid green;" draggable="true">
                dragme
            </div>
        </div>
        <input type="range" min="1" max="100" value="50" id="slider_range">
    </body>
</html>