Can anyone help me?

[Verrona]

Hi, I have a little problem. I want to know how to design a website like this.

http://www.glass.co.uk/uk/en/

Where the only the text refreshes itself while the frame/nav bar stays on the page.

Can anyone tell me what this is called please?

 

[vernon08]

Frame based web sites

the site you mentioned is a frame based web site which may look good , but be warned , search engines don't like them and it is hard to optimize them.