How to Check Images File Exist? in different server

Hi,
I have 10 different coldfusion server.
for example 9 server is for the web application site - for
example
http://myserverone/studentweb
the other one is for images website, just for displaying
student picture - for example
http://myserverimage/studentpicture.
the purpose of this website is to display student picture
that i store as gif files.
from my studentweb website i will call the images from
studentpicture website as source for my image placeholder.
for example this is my code i'm calling form
http://myserverone/studentweb
website:
<img src="
http://myserverimage/studentpicture/#studentnumber#.gif"
alt="" name="studentpicture" width="160" height="200">
my problem is, if there is no specific student picture in my
studentpicture website, then the placeholder will display an X (
mean the images not found )
how do i prevent the X to display?
how do i using coldfusion or any kind of way to check if the
images exist on that website ( different server ), so if the images
is not found, i can display a default images? i can do this if i'm
calling the website in the same server, but not using a different
server.
this is like using other website images for your own personal
website and sometimes the owner delete the images from their
website, and i want to display my own images if that images been
removed from the source website.
anyone have done this before?
thanks for suggestion and guide...
haire

1. Use CFHTTP with method="HEAD".
2. See, if the HTTP status code is 200.
The head-method is of course more efficient, as it doesn't
need to "get" the message body. However, a status code of 200 is
possible even when the requested image file is no longer on the
server.

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