jQuery.cookie = function (key, value, options) {

    // key and value given, set cookie...
    if (arguments.length > 1 && (value === null || typeof value !== "object")) {
        options = jQuery.extend({}, options);

        if (value === null) {
            options.expires = -1;
        }

        if (typeof options.expires === 'number') {
            var days = options.expires, t = options.expires = new Date();
            t.setDate(t.getDate() + days);
        }

        return (document.cookie = [
            encodeURIComponent(key), '=',
            options.raw ? String(value) : encodeURIComponent(String(value)),
            options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
            options.path ? '; path=' + options.path : '',
            options.domain ? '; domain=' + options.domain : '',
            options.secure ? '; secure' : ''
        ].join(''));
    }

    // key and possibly options given, get cookie...
    options = value || {};
    var result, decode = options.raw ? function (s) { return s; } : decodeURIComponent;
    return (result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie)) ? decode(result[1]) : null;
};

if ($.cookie("lang_pharma") == null)
    $.cookie("lang_pharma", "de");


if (($.cookie("lang_pharma") == "de") || ($.cookie("lang_pharma") == null)) {
    $('#de').css({ 'display': 'block' });
    $('#en').css({ 'display': 'none' });
}
else {
    $('#en').css({ 'display': 'block' });
    $('#de').css({ 'display': 'none' });
}

$(document).ready(function () {   
    $('#deBtn').click(function () {
        if ($('#de').css('display') == 'none' && $('#en').css('display') == 'block') {
            $('#de').css({ 'display': 'block' });
            $('#en').css({ 'display': 'none' });
            $.cookie("lang_pharma", "de");
        }
    });
    $('#enBtn').click(function () {
        if ($('#en').css('display') == 'none' && $('#de').css('display') == 'block') {
            $('#en').css({ 'display': 'block' });
            $('#de').css({ 'display': 'none' });
            $.cookie("lang_pharma", "en");
        }
    });
});