原型 - readAttribute() 方法
此方法返回元素属性的值或 null(若未指定属性)。
语法
element.readAttribute(attribute);
返回值
返回元素属性的值或 null(若未指定属性)。
示例
<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>
输出
prototype_element_object.htm
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