jQuery.fn.dataTableExt.oSort['percent-asc'] = function(a, b) {
    var x = (a == "-") ? 0 : a.replace(/%/, "");
    var y = (b == "-") ? 0 : b.replace(/%/, "");
    x = parseFloat(x);
    y = parseFloat(y);
    return ((x < y) ? -1 : ((x > y) ? 1 : 0));
};

jQuery.fn.dataTableExt.oSort['percent-desc'] = function(a, b) {
    var x = (a == "-") ? 0 : a.replace(/%/, "");
    var y = (b == "-") ? 0 : b.replace(/%/, "");
    x = parseFloat(x);
    y = parseFloat(y);
    return ((x < y) ? 1 : ((x > y) ? -1 : 0));
};

jQuery.fn.dataTableExt.oSort['num-html-asc'] = function(a, b) {
    var x = a.replace(/<.*?>/g, "");
    var y = b.replace(/<.*?>/g, "");
    x = parseFloat(x);
    y = parseFloat(y);
    return ((x < y) ? -1 : ((x > y) ? 1 : 0));
};

jQuery.fn.dataTableExt.oSort['num-html-desc'] = function(a, b) {
    var x = a.replace(/<.*?>/g, "");
    var y = b.replace(/<.*?>/g, "");
    x = parseFloat(x);
    y = parseFloat(y);
    return ((x < y) ? 1 : ((x > y) ? -1 : 0));
};

jQuery.fn.dataTableExt.aTypes.unshift(function (sData) {
    sData = typeof sData.replace == 'function' ?
            sData.replace(/<.*?>/g, "") : sData;
    sData = $.trim(sData);

    var sValidFirstChars = "0123456789-";
    var sValidChars = "0123456789.";
    var Char;
    var bDecimal = false;

    /* Check for a valid first char (no period and allow negatives) */
    Char = sData.charAt(0);
    if (sValidFirstChars.indexOf(Char) == -1) {
        return null;
    }

    /* Check all the other characters are valid */
    for (var i = 1; i < sData.length; i++) {
        Char = sData.charAt(i);
        if (sValidChars.indexOf(Char) == -1) {
            return null;
        }

        /* Only allowed one decimal place... */
        if (Char == ".") {
            if (bDecimal) {
                return null;
            }
            bDecimal = true;
        }
    }
    return 'num-html';
});