js操作table中tr的顺序实现上移下移一行的效果-创新互联

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 = "";
        newHtml += ("" + tab.rows[0].innerHTML + "");
        for (i = 1; i < tab.rows.length; i++) {
          if (i == (nowNowIndex - 1)) {
            newHtml += ("" + nowNodeInnerHtml + "");
          }
          newHtml += ("" + tab.rows[i].innerHTML + "");
        }
        newHtml += "";
        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 = "";
        newHtml += ("" + tab.rows[0].innerHTML + "");
        for (i = 1; i < tab.rows.length; i++) {
          if (i == (nowNowIndex + 1)) {
            newHtml += ("" + nowNodeInnerHtml + "");
          }
          newHtml += ("" + tab.rows[i].innerHTML + "");
        }
        //向下可能到表格现有行数外 额外处理
        if (tab.rows.length == (nowNowIndex + 1)) {
          newHtml += ("" + nowNodeInnerHtml + "");
        }
        newHtml += "";
        document.getElementById("divContent").innerHTML = newHtml;
      }
    }