Prototype – 元素对象 readAttribute() 方法

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