Image Source Problem with Url Rewrite

hi,
http://localhost/abc-project/contact/  (this url is my user friendly url.i use redirect method url rewrite.)
http://localhost/abc-project/contact.aspx  (this is the orginal url.)


when i insert an image on the page like this
<img src="images/world.jpg" />
system try to find under this adress http://localhost/abc-project/contact/images/world.jpg
but contact is not a real directory. how can i fix this problem ?
thanks.










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