Prototype-element-undopositioned
提供：Dev Guides
プロトタイプ-undoPositioned（）メソッド
このメソッドは、要素を_Element.makePositioned_が適用される前の状態に戻します。
構文
element.undoPositioned();戻り値
HTML要素を返します。
例
<html>
<head>
<title>Prototype examples</title>
<script type = "text/javascript" src = "/javascript/prototype.js"></script>
<script>
function Positioned() {
$('container').makePositioned();
}
function UnPositioned() {
$('container').undoPositioned();
}
</script>
</head>
<body>
<p>Click the buttons to see the result.</p>
<br/>
<div id = "container">
<div id = "element"
style = "position:absolute; top: 60px; left: 20px; border:1px solid red;">
This is Element Box
</div>
</div>
<br/>
<input type = "button" value = "Postioned" onclick = "Positioned();"/>
<input type = "button" value = "UnPositioned" onclick = "UnPositioned();"/>
</body>
</html>