標籤：func abs 圖片 margin position 需要 load lang 繼承
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script src="Drag.js"></script>
<script src="LimitDrag.js"></script>
<style>
#box1{width: 100px;
height:100px;background-color: #00ee00;position: absolute;}
#box2{width: 100px;
height:100px;background-color: red;position: absolute;}
</style>
<script>
window.onload=function(){
new Drag("box1")
new LimitDrag("box2")
}
</script>
</head>
<body>
<div id="box1"></div>
<div id="box2"></div>
</body>
</html>
圖片拖拽的繼承，引用 1 （需要引入2，3兩個js才能運行）
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