How to add Trebuchet MS font in fckeditor

[truptip5]

Hi,
I am using fckeditor in a web apppication. I need to add Trebuchet MS font .I am addig it in fckconfig.js file as follows:
FCKConfig.FontN ame= 'Arial;Comic Sans MS;Courier New;Tahoma;Time s New Roman;Verdana;T rebuchet MS' ;

But it dont work.Font is not added to the font list.
Kindly suggest the solutions.

Thnaks in advance.