Disclaimer in Sharepoint 2010

I'm trying to set up a pop up window with a URL to a document each time my Sharepoint site is loaded.

I read that it can be done by adding a content editor web part with a following code to a page:

<script src="/_layouts/sp.core.js" type="text/javascript"></script><script src="/_layouts/sp.runtime.js" type="text/javascript"></script><script src="/_layouts/sp.js" type="text/javascript"></script><script src="/_layouts/SP.UI.Dialog.js" type="text/javascript"></script><script type="text/javascript">
ExecuteOrDelayUntilScriptLoaded(function ()
{var options = SP.UI.$create_DialogOptions();
options.title = "My Dialog Title";
options.width = 400;
options.height = 600;
options.url = "/SomePage/SitePages/Home.aspx";
SP.UI.ModalDialog.showModalDialog(options);},'sp.js');</script>

But I'm getting an error in Mozila console: TypeError: SP.Res

This what I'm getting in IE console: 'SP.Res.hiddenButtonValueBeforeDialog' is null or not an object

And Modal dialog is not showing up.

Sharepoint version: 2010 Foundation.

Please advice what am I doing wrong.

Taras1234567