function ExecuteBookmark() {

        if(navigator.userAgent.indexOf("MSIE") != -1) {

            window.external.AddFavorite(location.href, document.title);

        } else if(navigator.userAgent.indexOf("Opera") != -1) {

            alert("To bookmark this page press CTRL + T or for Mac users Apple + T");

        } else {

            alert("To bookmark this page press CTRL + D or for mac users Apple + D");

        }

    }