tablesort.js

var TableIDvalue = "table";
var TableLastSortedColumn = -1;
function SortTable()
{
    var sortColumn = parseInt(arguments[0]);
    var type = arguments.length > 1 ? arguments[1] : 'T';
    var dateformat = arguments.length > 2 ? arguments[2] : '';
    var table = document.getElementById(TableIDvalue);
    var tbody = table.getElementsByTagName("tbody")[0];
    var rows = tbody.getElementsByTagName("tr");
    var arrayOfRows = new Array();
    type = type.toUpperCase();
    dateformat = dateformat.toLowerCase();
    for (var i = 0, len = rows.length; i < len; i++) {
        arrayOfRows[i] = new Object;
        arrayOfRows[i].oldIndex = i;
        var celltext = rows[i].getElementsByTagName("td")[sortColumn].innerHTML.replace(/<[^>]*>/g,"");
        if(type=='D') {
            arrayOfRows[i].value = GetDateSortingKey(dateformat,celltext);
        } else {
            var re = type=="N" ? /[^\.\-\+\d]/g : /[^a-zA-Z0-9]/g;
            arrayOfRows[i].value = celltext.replace(re,"").substr(0,25).toLowerCase();
        }
    }
    if (sortColumn == TableLastSortedColumn) {
        arrayOfRows.reverse();
    } else {
        TableLastSortedColumn = sortColumn;
        switch(type) {
            case "N" : arrayOfRows.sort(CompareRowOfNumbers); break;
            case "D" : arrayOfRows.sort(CompareRowOfNumbers); break;
            default  : arrayOfRows.sort(CompareRowOfText);
        }
    }
    var newTableBody = document.createElement("tbody");
    for (var i = 0, len = arrayOfRows.length; i < len; i++) {
        newTableBody.appendChild(rows[arrayOfRows[i].oldIndex].cloneNode(true));
    }
    table.replaceChild(newTableBody,tbody);
}
function CompareRowOfText(a,b) {
    var aval = a.value;
    var bval = b.value;
    return( aval == bval ? 0 : (aval > bval ? 1 : -1) );
}
function CompareRowOfNumbers(a,b) {
    var aval = /\d/.test(a.value) ? parseFloat(a.value) : 0;
    var bval = /\d/.test(b.value) ? parseFloat(b.value) : 0;
    return( aval == bval ? 0 : (aval > bval ? 1 : -1) );
}
function GetDateSortingKey(format,text)
{
    if (format.length < 1) {
        return "";
    }
    format = format.toLowerCase();
    text = text.toLowerCase();
    text = text.replace(/^[^a-z0-9]*/,"");
    text = text.replace(/[^a-z0-9]*$/,"");
    if (text.length < 1) {
        return "";
    }
    text = text.replace(/[^a-z0-9]+/g,",");
    var date = text.split(",");
    if (date.length < 3) {
        return "";
    }
    var d = 0, m = 0, y = 0;
    for (var i = 0; i < 3; i++) {
        var ts = format.substr(i, 1);
        if (ts == "d") {
            d = date[i];
        } else if (ts == "m") {
            m = date[i];
        } else if (ts == "y") {
            y = date[i];
        }
    }
    d = d.replace(/^0/, "");
    if (d < 10) {
        d = "0" + d;
    }
    if(/[a-z]/.test(m)) {
        m = m.substr(0,3);
        switch(m) {
            case "jan" : m = String(1); break;
            case "feb" : m = String(2); break;
            case "mar" : m = String(3); break;
            case "apr" : m = String(4); break;
            case "may" : m = String(5); break;
            case "jun" : m = String(6); break;
            case "jul" : m = String(7); break;
            case "aug" : m = String(8); break;
            case "sep" : m = String(9); break;
            case "oct" : m = String(10); break;
            case "nov" : m = String(11); break;
            case "dec" : m = String(12); break;
            default    : m = String(0);
        }
    }
    m = m.replace(/^0/,"");
    if (m < 10) {
        m = "0" + m;
    }
    y = parseInt(y);
    if (y < 100) {
        y = parseInt(y) + 2000;
    }
    return "" + String(y) + "" + String(m) + "" + String(d) + "";
}