How to load user defined functions written in another file

Hello,
     This is most probably basic, but i simply couldn't find the answer.
I have written a function in a separate file multi.r, and would like  
to load this into the R-IDE so that I can use my function.
How do i go about it?

Thank you in advance.
Saptarshi


Saptarshi Guha|sapsi at pobox.com|http://blue.chem.psu.edu/~saptarshi