function addCss(cssCode) {
    var styleElement = document.createElement('style');
    styleElement.type = 'text/css';
    if (styleElement.styleSheet) {
        styleElement.styleSheet.cssText = cssCode;
    }
    else {
        styleElement.appendChild(document.createTextNode(cssCode));
    }
    document.getElementsByTagName('head')[0].appendChild(styleElement);
}

function addScript(scriptCode) {
    var scriptElement = document.createElement('script');
    scriptElement.type = 'text/javascript';
    scriptElement.text = scriptCode;
    document.getElementsByTagName('head')[0].appendChild(scriptElement);
}

function randomXToY(minVal, maxVal, floatVal) {
    var randVal = minVal + (Math.random() * (maxVal - minVal));
    return typeof floatVal == 'undefined' ? Math.round(randVal) : randVal.toFixed(floatVal);
}