<!DOCTYPE HTML><html><head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> <title>测试代码</title> <script type="text/javascript"> function a(){ var body = document.body; var table = document.createElement("table"); body.appendChild(table); table.setAttribute("border","1"); table.setAttribute("width","50%"); table.setAttribute("id","table"); var input = document.createElement("input"); input.setAttribute("type","button"); input.setAttribute("value","填写信息"); input.setAttribute("onclick","add1()"); body.appendChild(input); } function add1(){ var table = document.getElementsByTagName("table"); var tr = document.createElement("tr"); // table.appendChild(tr); for (var i=1;i<=4;i++){ var td = document.createElement("td"); td.innerHTML = "<input type='text'>"; tr.appendChild(td); } table.appendChild(tr); } </script></head><body> <input type="button" value="添加" onclick="a()"/></body></html>
2 回答
李晓健
TA贡献1036条经验 获得超461个赞
<body> <input type="button" value="添加" onclick="a()"/> <!--因为你的页面没以有写table标签--> <table></table> </body>
function add1(){
//你这里在页面找table标签 而你页面却没有table标签
var table = document.getElementsByTagName("table");
var tr = document.createElement("tr");
for (var i=1;i<=4;i++){
var td = document.createElement("td");
td.innerHTML = "<input type='text'>";
tr.appendChild(td);
}
table.appendChild(tr);
}看注释
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