function adwordsSetCookie(name, value, days){
    var date = new Date();
    date.setTime(date.getTime() + (days*24*60*60*1000)); 
    var expires = "; expires=" + date.toGMTString();
    document.cookie = name + "=" + value + expires + ";domain=sketchengine.co.uk;path=/";
}
function adwordsGetParam(p){
    var match = RegExp('[?&]' + p + '=([^&]*)').exec(window.location.search);
    return match && decodeURIComponent(match[1].replace(/\+/g, ' '));
}
function adwordsCookie(){
    var gclid = adwordsGetParam('gclid');
    if(gclid){
        var gclsrc = adwordsGetParam('gclsrc');
        if(!gclsrc || gclsrc.indexOf('aw') !== -1){
            adwordsSetCookie('gclid', gclid, 90);
        }
    }
}