JavaScript gets the value of the current row of the table, deletes rows, and adds rows

JavaScript gets the value of the current row of the table, deletes rows, and adds rows_javascript skills

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Release： 2016-05-16 15:51:47

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Js获取 table当前行的值</title>
<script language=javascript>
	var selectedTr = null;
	function c1(obj) {
		obj.style.backgroundColor = 'blue'; //把点到的那一行变希望的颜色; 
		if (selectedTr != null)
			selectedTr.style.removeAttribute("backgroundColor");
		if (selectedTr == obj)
			selectedTr = null;//加上此句，以控制点击变白，再点击反灰 
		else
			selectedTr = obj;
	}
	/*得到选中行的第一列的值*/
	function check() {
		if (selectedTr != null) {
			var str = selectedTr.cells[0].childNodes[0].value;
			document.getElementById("lab").innerHTML = str;
		} else {
			alert("请选择一行");
		}
	}
	/*删除选中行*/
	function del() {
		if (selectedTr != null) {
			if (confirm("确定要删除吗&#63;")) {
				alert(selectedTr.cells[0].childNodes[0].value);
				var tbody = selectedTr.parentNode;
				tbody.removeChild(selectedTr);
			}
		} else {
			alert("请选择一行");
		}
	}
</script>
</head>
<body>
	单击选中Tr，高亮显示，再单击取消选选中。
	<input type=button value="选中的是哪一行？" onclick="check()">
	<input type=button value="删除选中行" onclick="del()">
	<input type=button value="增加一行" onclick="add()">
	<table width="100%" border="1" cellspacing="0" cellpadding="0" id="tab">
		<tr onclick="c1(this);" bgcolor="#cccccc">
			<td><input type="text" value="11"></td>
			<td><input type="text" value="12"></td>
		</tr>
		<tr onclick="c1(this);" bgcolor="#e0e0e0">
			<td><input type="text" value="21"></td>
			<td><input type="text" value="22"></td>
		</tr>
		<tr onclick="c1(this);" bgcolor="#cccccc">
			<td><input type="text" value="31"></td>
			<td><input type="text" value="32"></td>
		</tr>
		<tr onclick="c1(this);" bgcolor="#e0e0e0">
			<td><input type="text" value="41"></td>
			<td><input type="text" value="42"></td>
		</tr>
		<tr onclick="c1(this);" bgcolor="#cccccc">
			<td><input type="text" value="51"></td>
			<td><input type="text" value="52"></td>
		</tr>
	</table>
	<label id="lab"></label>
</body>
</html>

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