js操作table中tr的顺序，实现上移下移一行的效果

总体思路是在table外部加个div，修改div的innerHtml实现改变tr顺序的效果

具体思路是

获取当前要移动tr行的rowIndex，在table中删除掉，然后循环table的rows，到了目标行再直接加进去，最后把整体的html赋值给div完成效果

js代码如下

        //使行向上一行
        function setRowUp(obj) {
            if (obj.parentNode.parentNode.rowIndex != 1) {
                var tab = obj.parentNode.parentNode.parentNode;
                var nowNodeInnerHtml = obj.parentNode.parentNode.innerHTML;
                var nowNowIndex = obj.parentNode.parentNode.rowIndex;
                tab.deleteRow(nowNowIndex);
                var newHtml = "<table cellpadding=\"5\" cellspacing=\"0\">";
                newHtml += ("<TR style='font-weight: bold; text-align: center;'>" + tab.rows[0].innerHTML + "</TR>");
                for (i = 1; i < tab.rows.length; i++) {
                    if (i == (nowNowIndex - 1)) {
                        newHtml += ("<TR>" + nowNodeInnerHtml + "</TR>");
                    }
                    newHtml += ("<TR>" + tab.rows[i].innerHTML + "</TR>");
                }
                newHtml += "</table>";
                document.getElementById("divContent").innerHTML = newHtml;
            }
        }
        //使行向下一行
        function setRowDown(obj) {
            if (obj.parentNode.parentNode.rowIndex != (document.getElementById("divContent").childNodes[0].rows.length - 1)) {
                var tab = obj.parentNode.parentNode.parentNode;
                var nowNodeInnerHtml = obj.parentNode.parentNode.innerHTML;
                var nowNowIndex = obj.parentNode.parentNode.rowIndex;
                tab.deleteRow(nowNowIndex);
                var newHtml = "<table cellpadding=\"5\" cellspacing=\"0\">";
                newHtml += ("<TR style='font-weight: bold; text-align: center;'>" + tab.rows[0].innerHTML + "</TR>");
                for (i = 1; i < tab.rows.length; i++) {
                    if (i == (nowNowIndex + 1)) {
                        newHtml += ("<TR>" + nowNodeInnerHtml + "</TR>");
                    }
                    newHtml += ("<TR>" + tab.rows[i].innerHTML + "</TR>");
                }
                //向下可能到表格现有行数外 额外处理
                if (tab.rows.length == (nowNowIndex + 1)) {
                    newHtml += ("<TR>" + nowNodeInnerHtml + "</TR>");
                }
                newHtml += "</table>";
                document.getElementById("divContent").innerHTML = newHtml;
            }
        }

测试html代码如下

<body>
    <div id="divContent">
        <table cellpadding="5" cellspacing="0">
            <tr style='font-weight: bold; text-align: center;'><td>工号</td><td>姓名</td></tr>
            <tr><td>0001
                <input type="button" value="↑" onclick="setRowUp(this)" />
                <input type="button" value="↓" onclick="setRowDown(this)" />
                </td><td>姓名01</td></tr>
            <tr><td>0002
                <input type="button" value="↑" onclick="setRowUp(this)" />
                <input type="button" value="↓" onclick="setRowDown(this)" />
                </td><td>姓名02</td></tr>
            <tr><td>0003
                <input type="button" value="↑" onclick="setRowUp(this)" />
                <input type="button" value="↓" onclick="setRowDown(this)" />
                </td><td>姓名03</td></tr>
            <tr><td>0004
                <input type="button" value="↑" onclick="setRowUp(this)" />
                <input type="button" value="↓" onclick="setRowDown(this)" />
                </td><td>姓名04</td></tr>
            <tr><td>0005
                <input type="button" value="↑" onclick="setRowUp(this)" />
                <input type="button" value="↓" onclick="setRowDown(this)" />
                </td><td>姓名05</td></tr>
        </table>
    </div>
</body>