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";
}