function implode( glue, pieces ) {
    // Joins array elements placing glue string between items and return one string  
    // 
    // version: 812.316
    // discuss at: http://phpjs.org/functions/implode
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Waldo Malqui Silva
    // *     example 1: implode(' ', ['Kevin', 'van', 'Zonneveld']);
    // *     returns 1: 'Kevin van Zonneveld'
    return ( ( pieces instanceof Array ) ? pieces.join ( glue ) : pieces );
}

function in_array(needle, haystack, argStrict) {
    // Checks if the given value exists in the array  
    // 
    // version: 903.1614
    // discuss at: http://phpjs.org/functions/in_array
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // *     example 1: in_array('van', ['Kevin', 'van', 'Zonneveld']);
    // *     returns 1: true
    var found = false, key, strict = !!argStrict;

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

    return found;
}