Using jQuery dynamically add and delete rows inside the table, not much to say directly on the code.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>元素的添加与删除</title>
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<script type="text/javascript" src="jquery-1.10.1.js"></script>
</head>
<body>
<form>
<table border="1px" width="200px" id="table1">
<tr style="height: 20px">
<td>0</td>
<td ><input type="button" οnclick="add(this);" value="添加"></td>
</tr>
<tr style="height: 20px">
<td>1</td>
<td ><input type="button" οnclick="del(this);" value="删除"></td>
</tr>
<tr id="tr2" style="height: 20px">
<td>2</td>
<td ><b οnclick="del(this);">删除</b></td>
</tr>
</table>
</form>
</body>
<script type="text/javascript">
var i=3;
function del(e) {
$(e).parent().parent().remove();
i--;
}
function add() {
$("#table1").append("<tr style=\"height: 20px\">\n" +
" <td>"+i+"</td>\n" +
" <td ><input type=\"button\" οnclick=\"del(this);\" value=\"删除\"></td>\n" +
" </tr>")
i++;
}
</script>
</html>