DiffHideMasthead

function DiffHideMasthead() {
    if(urlQuery('diff') && document.getElementById('UserProfileMasthead')) {
        document.getElementById('UserProfileMasthead').style.display:none;
    }
}

function urlQuery(quer) {
    for(i in location.href.split('?')) {
        for(j in location.href.split('?')[i].split('&')) {
            if(location.href.split('?')[i].split('&')[j].split('=')[0] == quer) {
                return location.href.split('?')[i].split('&')[j].split('=')[1];
            }
        }
    }
    return undefined;
}