sort table column

by jelane20

HTML

<table id="caltbl">
<tbody>
    <tr>
        <td>4</td>
        <td>7</td>
    </tr>
    <tr>
        <td>1</td>
        <td>2</td>
    </tr>
     </tbody>
</table>

JavaScript

function sortTable(){
    var tbl = document.getElementById("caltbl").tBodies[0];
    var store = [];
    for(var i=0, len=tbl.rows.length; i<len; i++){
        var row = tbl.rows[i];
        var sortnr = parseFloat(row.cells[0].textContent || row.cells[0].innerText);
        if(!isNaN(sortnr)) store.push([sortnr, row]);
    }
    store.sort(function(x,y){
        return x[0] - y[0];
    });
    for(var i=0, len=store.length; i<len; i++){
        tbl.appendChild(store[i][1]);
    }
    store = null;
}
sortTable();