：js如何给table某一列内容相同排序在一起

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<script>

function sortTableByColumn(table, columnIndex) {

  var tbody = table.tBodies[0];

  var rows = Array.prototype.slice.call(tbody.rows, 0);

  rows.sort(function(a, b) {

    var cellA = a.cells[columnIndex];

    var cellB = b.cells[columnIndex];

    if (cellA.textContent < cellB.textContent) {

      return -1;

    }

    if (cellA.textContent > cellB.textContent) {

      return 1;

    }

    return 0;

  });

  // Re-use tbody for the animation

  // Detach tbody from table so that we can use insertBefore

  table.removeChild(tbody);

  // Append each row in order

  for (var i = 0; i < rows.length; i++) {

    tbody.appendChild(rows[i]);

  }

  // Attach tbody to the table

  table.appendChild(tbody);

}

// 使用方法: 假设table有id "myTable"，要排序的是第二列

var table = document.getElementById('myTable');

sortTableByColumn(table, 1);

</script>