只有一列只能一次的排列

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<html>
    <head>
 <title>Table Sort Example</title>
        <script type="text/javascript">
       
            function compareTRs(oTR1, oTR2) {
                var sValue1 = oTR1.cells[0].firstChild.nodeValue;
                var sValue2 = oTR2.cells[0].firstChild.nodeValue;

                return sValue1.localeCompare(sValue2);
            }

   
            function sortTable(sTableID) {
                var oTable = document.getElementById(sTableID);
                var oTBody = oTable.tBodies[0];
                var colDataRows = oTBody.rows;
                var aTRs = new Array;
       
                for (var i=0; i < colDataRows.length; i++) {
                    aTRs[i] = colDataRows[i];
                }
       
                aTRs.sort(compareTRs);
       
                var oFragment = document.createDocumentFragment();
                for (var i=0; i < aTRs.length; i++) {
                    oFragment.appendChild(aTRs[i]);
                }
      
                oTBody.appendChild(oFragment);
            }

   
        </script>
    </head>

    <body>
        <p>Click on the table header to sort in ascending order.</p>
        <table border="1" id="tblSort">
            <thead>
                <tr>
                    <th onclick="sortTable('tblSort')" style="cursor:pointer">Last Name</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td>Smith</td>
                </tr>
                <tr>
                    <td>Johnson</td>
                </tr>
                <tr>
                    <td>Henderson</td>
                </tr>
                <tr>
                    <td>Williams</td>
                </tr>
                <tr>
                    <td>Gilliam</td>
                </tr>
                <tr>
                    <td>Walker</td>
                </tr>
            </tbody>
        </table>       
    </body>
</html>