HTMl 添加

<script>
			function tj() {
				var xj_tr = document.createElement("tr");

				var shuju_name = document.getElementById("a_name");
				var shuju_age = document.getElementById("a_age");
				var shuju_buil = document.getElementById("a_buil");
				if(isNaN(shuju_age.value) == false) {
					var ipp = document.getElementById("ip");
					ipp.innerText = "";
					var tianjia_name = document.createElement("td");
					var tianjia_age = document.createElement("td");
					var tianjia_buil = document.createElement("td");
					var tianjia_shanchu = document.createElement("td");

					tianjia_name.innerText = shuju_name.value;
					tianjia_age.innerText = shuju_age.value;
					tianjia_buil.innerText = shuju_buil.value;

					var shanchu = document.createElement("button");
					shanchu.innerText = "刪除";

					shanchu.onclick = function() {
						this.parentNode.remove();
					}
					tianjia_shanchu.appendChild(shanchu);
					xj_tr.appendChild(tianjia_name);
					xj_tr.appendChild(tianjia_age);
					xj_tr.appendChild(tianjia_buil);
					xj_tr.appendChild(shanchu);
					var z = document.getElementById("z_table");
					z.appendChild(xj_tr);
				} else {
					var ipp = document.getElementById("ip");
					ipp.innerText = "年齡輸入不對";
				}

			}
		</script>

<font>姓名 </font><input type="text" id="a_name" />
		<font>年齡</font><input type="text" id="a_age" />
		<font>生日</font><input type="text" id="a_buil" />
		<input type="button" value="添加" onclick="tj()" />
		<br />
		<p id="ip"></p>
		<br />
		<table border="1" id="z_table">
			<tr>
				<th width="100px">姓名</th>
				<th width="100px">年齡</th>
				<th width="100px">生日</th>
				<th width="100px">删除</th>
			</tr>

		</table>