How do you sew elastic to fabric?

I'm making a skirt and I have this elastic for a belt like thing.

Here is an example: http://houseofcalibre.files.wordpress.com/2010/03/shop-bop-foley-corinna-elastic-belt-skirt.jpg



The picture is the only one I can find.

How do you do it?How do you sew elastic to fabric?
This blog explains how to sew elastic.



http://1ststeptosewingsuccess.blogspot.c鈥?/a>

vance and hines