[javascript] Parse DateTime string in JavaScript

This function handles also the invalid 29.2.2001 date.

function parseDate(str) {
    var dateParts = str.split(".");
    if (dateParts.length != 3)
        return null;
    var year = dateParts[2];
    var month = dateParts[1];
    var day = dateParts[0];

    if (isNaN(day) || isNaN(month) || isNaN(year))
        return null;

    var result = new Date(year, (month - 1), day);
    if (result == null)
        return null;
    if (result.getDate() != day)
        return null;
    if (result.getMonth() != (month - 1))
        return null;
    if (result.getFullYear() != year)
        return null;

    return result;
}

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