<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <html xmlns=" http://www.w3.org/1999/xhtml "> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>无标题文档</title> </head> <body> <ul id="ul"> <li><a href="#">测试</a></li> </ul> <input type="button" value="增加" onclick="zeng()" /> <input type="button" value="减少" onclick="jian()" /> <script language="javascript" type="text/javascript"> <!-- var obj=document.getElementById("ul"); function zeng(){ var liobj=document.createElement("li"); var alink=document.createElement("a"); var message=document.createTextNode("测试"); alink.appendChild(message); alink.href="#"; liobj.appendChild(alink); obj.appendChild(liobj); } function jian(){ var linum=document.getElementById("ul").getElementsByTagName("li"); var length=parseInt(linum.length); if(length==0){ alert("不好意思,已经没有给你删的le"); }else{ obj.removeChild(linum[0]); } } //--> </script> </body> </html>
0条大神的评论