function array_search (needle, haystack, argStrict) {
    // Searches the array for a given value and returns the corresponding key if successful
    //
    // version: 908.406
    // discuss at: http://phpjs.org/functions/array_search
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // *     example 1: array_search('zonneveld', {firstname: 'kevin', middle: 'van', surname: 'zonneveld'});
    // *     returns 1: 'surname'

    var strict = !!argStrict;
    var key = '';

    for (key in haystack) {
        if ((strict && haystack[key] === needle) || (!strict && haystack[key] == needle)) {
            return key;
        }
    }

    return false;
}