<script> var testEle = document.getElementById("test"); testEle.setAttribute("demo"); </script> <a href="#" id="test" demo="1" onclick="alert(this.attributes[‘demo‘].nodeValue)">（1）有</a> <a href="#" id="test" demo="2" onclick="alert(this.attributes[‘demo‘].nodeValue)">（2）无</a>
原文：http://www.cnblogs.com/baixc/p/4724867.html