Prototype-element-removeclassname
提供：Dev Guides
プロトタイプ-removeClassName（）メソッド
このメソッドは、要素のCSS classNameを削除して要素を返します。
構文
element.remove();戻り値
CSSクラスを削除する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 showResult() {
//Before removing class name
var arr = $('dingo').classNames();
arr.each(function(class) {
alert( "Before Removing, Class name is " + class );
});
$('dingo').removeClassName('food');
//After removing class name
var arr = $('dingo').classNames();
arr.each(function(class) {
alert( "After removing, Class name is " + class );
});
}
</script>
</head>
<body>
<p>Click the button to see the result.</p>
<div id = "dingo" class = "apple fruit food">
<ul>
<li id = "golden-delicious">Golden Delicious</li>
<li id = "mutsu">Mutsu</li>
<li id = "mcintosh">McIntosh</li>
<li id = "ida-red">Ida Red</li>
</ul>
</div>
<input type = "button" value = "Show Result" onclick = "showResult();"/>
</body>
</html>