function to create dom in a more concise way

createDom.js

var createDom = function (tag, config)
{
    var elem = document.createElement(tag);
    if (config) {

        for (var key in config) {
            if (key !== "attrs" && key !== "events" && key !== "styles" && key !== "options" && key !== "parent") {
                elem[key] = config[key];
            }
        }
        for (var key in config.attrs) {
            elem.setAttribute(key, config.attrs[key]);
        }
        for (var key in config.styles) {
            elem.style[key] = config.styles[key];
        }
        for (var key in config.events) {
            elem.addEventListener(key, config.events[key])
        }
        if (tag == "select" && config.options) {
            for (var key in config.options) {
                var option = createDom("option", { innerHTML: config.options[key].text, attrs: { "value": config.options[key].value } });
                if (config.options[key].selected) {
                    option.setAttribute("selected", "selected");
                }
                elem.appendChild(option);
            }
        }

        if (config.parent) config.parent.appendChild(elem);
    }
    return elem;
};