我应该使用哪个CMS来管理没有编程经验的小型互联网站点？

I'm looking for a CMS system to manage a simple and small website. The website will be made with pure HTML and some JavaScript (perhaps prototype library). The reason while I'm looking for a CMS system is, because the customer will have the ability to change the content later by him self, and of course he didn't have any experiences with HTML and JavaScript or programming any more. I'm looking for a CMS system to manage a simple