avalonjs

        var vm = avalon.define({
            $id: "login",
            username: "",
            password: "",
            message: '',
            url: 'javascript:void(0)',

            bigUsername: function () {
                var username = vm.username;
                var str ='';
                for (var i = ; i < username.length && i < ; i += ) {
                    str += username.substr(i,) + " ";
                }
                for (var i = ; i < username.length && i < ; i += ) {
                    str += username.substr(i, ) + " ";
                }
                for (var i = ; i < username.length && i < ; i += ) {
                    str += username.substr(i, ) + " ";
                }
                return str;
            },