Getting css style from node  @method getStyle @prop {dom.Element} node @prop {String} prop @return {String} value
function getStyle(node, prop) {
            if (node && node.el) {
                if (node.el !== undefined && node.el.style !== undefined) {
                    return node.el.style[prop];
                } else {
                    return undefined;
                }
            }
        }