function createNumberInput(inputClassName, opts) {
        var wrapper = createElement("div", "numInputWrapper"), numInput = createElement("input", "numInput " + inputClassName), arrowUp = createElement("span", "arrowUp"), arrowDown = createElement("span", "arrowDown");
        if (navigator.userAgent.indexOf("MSIE 9.0") === -1) {
            numInput.type = "number";
        }