greenhandc
2016-01-15 20:39
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> </head> <body> <p id="intro">我的课程</p> <ul> <li title="JS">JavaScript</li> <li title="JQ">JQuery</li> <li title="">HTML/CSS</li> <li title="JAVA">JAVA</li> <li title="">PHP</li> </ul> <h1>以下为li列表title的值,当title为空时,新设置值为"WEB前端技术":</h1> <script type="text/javascript"> var Lists=document.getElementsByTagName("li"); for (var i=0; i<Lists.length;i++) { var text=Lists[i].getAttribute("title"); document.write(text +"<br>"); if(text=="") { List[i].setAttribute("title","WEB前端技术"); document.write(List[i].getAttribute("title")); } } </script> </body> </html>
结果只显示了JS JQ是为什么
List[i].setAttribute("title","WEB前端技术");
document.write(List[i].getAttribute("title"));
Lists[i]少个字母
Lists,少了个s
JavaScript进阶篇
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