用js获取URL参数

<script type="text/javascript">
     var urlParams = (function (url) {
            var result = new Object();
            var idx = url.lastIndexOf('?');
            if (idx > 0) {
                var params = url.substring(idx + 1).split('&');
                for (var i = 0; i < params.length; i++) {
                    idx = params[i].indexOf('=');
                    if (idx > 0) {
                        result[params[i].substring(0, idx)] = params[i].substring(idx + 1);
                    }
                }
            }
            return result;
        })(window.location.href);
        var dbid= urlParams.dbid;
</script>