Direct reach with the URL

hi to all .
frist am glad to be a new member in this great Forum .
i hope you accept & like me. :pope:

i have some littel problem i hope to find the answer and help for it here.

some time when i visit some site i find the Url changing when press any button and the page never change also the main flash movie is still in the page . in the same time you can reach that movie or that section by using the URL directly …
for exampel :
the link in shown like this = “www.site.com/#contact” in this case it will show the Contact form Movie in the main movie
or "www.site.com/#start" in this it will show the frist main movie

this site http://www.fantasy-interactive.com/#start use what i mean :nose:

what i think in this case when you hit the button it will Load an external SWF Movie to the main Movie and change the URL in sasme time .

what i need is how to do some thing like that ? :huh:
i thing is some thing with the “java”

sorry for this long " Story" :smiley: am trying to make my Qs clear
and My poor English

waiting for reply’s

regards
Neon .