function minimize() {
            document.getElementById("holder").style.height = "30px";
            document.getElementById("holder").style.width = "100%";

            var btn = document.getElementById("resizebutton")
            btn.innerHTML = '+';
            btn.onclick = maximize;
            btn.blur();
        }
        function maximize() {
                document.getElementById("holder").style.height = "150px";
                document.getElementById("holder").style.width = "100%";
                var btn = document.getElementById("resizebutton")
                btn.innerHTML = '-';
                btn.onclick = minimize;
                btn.blur();
        }