<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
.droptarget {
float: left;
100px;
height: 35px;
margin: 15px;
padding: 10px;
border: 1px solid #aaaaaa;
}
</style>
</head>
<body>
<p>在两个矩形框中来回拖动 p 元素:</p>
<div class="droptarget" ondrop="drop(event)" ondragover="allowDrop(event)">
<p ondragstart="dragStart(event)" draggable="true" id="dragtarget">拖动我!</p>
</div>
<div class="droptarget" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<p style="clear:both;" id="demo"></p>
<script>
//开始拖动时，获取拖动对象的ID
function dragStart(event) {
event.dataTransfer.setData("Text", event.target.id);
document.getElementById("demo").innerHTML = "开始拖动 p 元素";
}
//当拖动对象在目标容器内拖动时触发
function allowDrop(event) {
event.preventDefault();
}
//当释放鼠标键时
function drop(event) {
event.preventDefault();//阻止事件默认行为
var data = event.dataTransfer.getData("Text");//得到拖动对象的ID
event.target.appendChild(document.getElementById(data));//将拖动对象添加到目标节点下
document.getElementById("demo").innerHTML = " p 元素已被拖动";
}
</script>
</body>
</html>