Portent, Inc. UK Cookie Law Solution: cookieConsent.js

/**
 * Script by Portent, an internet marketing agency. www.portent.com
*/

// change this variable to match your domain
var sitesubdomain = "www";
var sitedomain = "example-domain.com";

function cookieConsent(sGeobytesInternet,sGeobytesMapReference) {
        if (! Get_Cookie( 'cookieConsent' ) == true ) {
            if (typeof(sGeobytesInternet) == "undefined") {
               // Something has gone wrong with the variables, so set them to some default value,
               // maybe set a error flag to check for later on.
               var sGeobytesInternet = "unknown";
            }
                if (typeof(sGeobytesMapReference) == "undefined") {
                        var sGeobytesMapReference = "unknown";
                }
                sGeobytesMapReference = sGeobytesMapReference.replace(/^ */g, '').replace(/ *$/g, '');
                if (sGeobytesMapReference == "Europe") {
                        if (confirm("We need your consent to set browser cookies we use on this site. Press 'OK' to give your consent. For more information, please read our privacy policy.")) {
                                // parameters for Set_Cookie: name, value, expires, path, domain, secure
                                Set_Cookie( 'cookieConsent', true, '90', '/', sitedomain, '' );
                        } else {
                                // parameters for Delete_Cookie: name, path, domain
                                Delete_Cookie('cookieConsent', '/', sitedomain);
                                window.location = "http://" + sitesubdomain + "." + sitedomain + "/cookie-consent.htm";
                        }
            }
        } else if ( Get_Cookie( 'cookieConsent') == false ) {
                Delete_Cookie('cookieConsent', '/', sitedomain);
                window.location = "http://" + sitesubdomain + "." + sitedomain + "/cookie-consent.htm";
        }
}

function acceptCookies() {
        // parameters for Set_Cookie: name, value, expires, path, domain, secure
        Set_Cookie( 'cookieConsent', true, '90', '/', sitedomain, '' );
        alert("You have consented to allowing cookies. Click 'OK' to continue to the homepage.");
        window.location = "http://" + sitesubdomain + "." + sitedomain + "/";
}

function denyCookies() {
        // parameters for Delete_Cookie: name, path, domain
        Delete_Cookie('cookieConsent', '/', sitedomain);
        alert("You have choosen to NOT consent to allowing cookies.");
        window.location = "http://" + sitesubdomain + "." + sitedomain + "/cookie-consent.htm";
}

function Set_Cookie( name, value, expires, path, domain, secure ) {
        // set time, it's in milliseconds
        var today = new Date();
        today.setTime( today.getTime() );

        /*
        if the expires variable is set, make the correct
        expires time, the current script below will set
        it for x number of days, to make it for hours,
        delete * 24, for minutes, delete * 60 * 24
        */
        if ( expires )  {
                expires = expires * 1000 * 60 * 60 * 24;
        }
        var expires_date = new Date( today.getTime() + (expires) );

        document.cookie = name + "=" +escape( value ) +
        ( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
        ( ( path ) ? ";path=" + path : "" ) +
        ( ( domain ) ? ";domain=" + domain : "" ) +
        ( ( secure ) ? ";secure" : "" );
}

function Get_Cookie( check_name ) {
        // first we'll split this cookie up into name/value pairs
        // note: document.cookie only returns name=value, not the other components
        var a_all_cookies = document.cookie.split( ';' );
        var a_temp_cookie = '';
        var cookie_name = '';
        var cookie_value = '';
        var b_cookie_found = false; // set boolean t/f default f

        for ( i = 0; i < a_all_cookies.length; i++ ) {
                // now we'll split apart each name=value pair
                a_temp_cookie = a_all_cookies[i].split( '=' );

                // and trim left/right whitespace while we're at it
                cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');

                // if the extracted name matches passed check_name
                if ( cookie_name == check_name ) {
                        b_cookie_found = true;
                        // we need to handle case where cookie has no value but exists (no = sign, that is):
                        if ( a_temp_cookie.length > 1 ) {
                                cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
                        }
                        // note that in cases where cookie is initialized but no value, null is returned
                        return cookie_value;
                        break;
                }
                a_temp_cookie = null;
                cookie_name = '';
        }
        if ( !b_cookie_found )  {
                return null;
        }
}

// this deletes the cookie when called
function Delete_Cookie( name, path, domain ) {
if ( Get_Cookie( name ) ) document.cookie = name + "=" +
( ( path ) ? ";path=" + path : "") +
( ( domain ) ? ";domain=" + domain : "" ) +
";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}