W3Schools Tryit Editor

<!DOCTYPE HTML>
<html>
<head>
<style>
#droptarget {
  float: left; 
  width: 200px; 
  height: 35px;
  margin: 55px;
  margin-top: 155px;
  padding: 10px;
  border: 1px solid #aaaaaa;
}
</style>
</head>
<body>

<p ondragstart="dragStart(event)" draggable="true" id="dragtarget">Drag me into the rectangle!</p>

function allowDrop(event) {
  event.preventDefault();
  document.getElementById("demo").innerHTML = "The p element is OVER the droptarget.";
  event.target.style.border = "4px dotted green";
}

function drop(event) {
  event.preventDefault();
  var data = event.dataTransfer.getData("Text");
  event.target.appendChild(document.getElementById(data));
  document.getElementById("demo").innerHTML = "The p element was dropped.";
}
</script>

</body>

</html>

​x
 
<!DOCTYPE HTML><html><head><style>#droptarget {  float: left;   width: 200px;   height: 35px;  margin: 55px;  margin-top: 155px;  padding: 10px;  border: 1px solid #aaaaaa;}</style></head><body>​<p ondragstart="dragStart(event)" draggable="true" id="dragtarget">Drag me into the rectangle!</p>​<div id="droptarget" ondrop="drop(event)" ondragover="allowDrop(event)"></div>​<p style="clear:both;" id="demo"></p>​<script>function dragStart(event) {  event.dataTransfer.setData("Text", event.target.id);}​function allowDrop(event) {  event.preventDefault();  document.getElementById("demo").innerHTML = "The p element is OVER the droptarget.";  event.target.style.border = "4px dotted green";}​function drop(event) {  event.preventDefault();  var data = event.dataTransfer.getData("Text");  event.target.appendChild(document.getElementById(data));  document.getElementById("demo").innerHTML = "The p element was dropped.";}</script>​</body>​