javascript 给关键字加链接

var keys = {
        "和尚":["http://www.baidu.com","#ff0000"],
        "系统":["http://www.google.com","#00ff00"]
    }
    document.body.innerHTML = document.body.innerHTML.replace(/(和尚|系统)/g,function(){
            var u=arguments[0];
            return u.fontcolor(keys[u][1]).link(keys[u][0]);
        }
    );