LINEからの流入をGAに食わせる(?ref=lineが入っていた場合に動作)

line_ref.js

<!--LINE ref検知-->
<script>
//URLの文字列を取得
function getQueryString(){
    var result = {};
    if( 1 < window.location.search.length ){
        var query = window.location.search.substring( 1 );
        var parameters = query.split( '&' );
        for( var i = 0; i < parameters.length; i++ ){
            var element = parameters[ i ].split( '=' );
            var paramName = decodeURIComponent( element[ 0 ] );
            var paramValue = decodeURIComponent( element[ 1 ] );
            result[ paramName ] = paramValue;
        }
    }
    return result;
}
var lineref = "http://line.me/";
if(getQueryString().ref == "line"){
    delete window.document.referrer;
    window.document.referrer = lineref;
    window.document.__defineGetter__('referrer', function () {
        return lineref;
    });
    window.history.pushState(null,null,document.location.origin + document.location.pathname);
}
</script>