Why do i get "Expected an assignment or function call and instead saw an expression"

[jansen...@gmail.com]

If i write the code:

(function () {"use strict";

$(document).ready(function()

{

$("#loginbutton").click(function()

{

$(".login-form").show(300);

});  

});

});

Dreamweaver gives an error: "Expected an assignment or function call and instead saw an expression".

How can i fix that? He gives the error on the last row.