返回到：Prototype – 元素对象
如果未指定属性，则此方法返回元素属性的值或 null。
语法
element.readAttribute(attribute);
返回值
返回元素属性的值，如果未指定属性，则返回 null。
例子
<html>
<head>
<title>Prototype examples</title>
<script type = "text/javascript" src = "/javascript/prototype.js"></script>
<script>
function showResult() {
var str = $('tag').readAttribute('href');
alert("Value of href : " + str );
var str = $('tag').readAttribute('title');
alert("Value of title : " + str );
var str = $('tag').readAttribute('somethingelse');
alert("Value ofsomething else : " + str );
}
</script>
</head>
<body>
<p>Click the button to see the result.</p>
<a id = "tag" href = "/tags/prototype" rel = "tag"
title = "view related bookmarks.">Prototype</a>
<br />
<br />
<input type = "button" value = "Show Result" onclick = "showResult();"/>
</body>
</html>返回到：Prototype – 元素对象
作者：terry，如若转载，请注明出处：https://www.web176.com/prototype_api/9049.html
