slow load URL

[Nicolas Cueto]

Thank you, Eric and Ian.

If it's ok, I've another related question.

Recently, my web-host's file-server has been acting
erraticly, including temporary down times. Unfortunately,
the problem struck right in the middle of one of my school 
classes. This resulted in some stacks being able to download
file-urls while others couldn't just because they happened to
log on at a different point n time.

My question then is how, when a status message is "error",
to keep calling an url until it finally gets thru?  

Sorry for being vague.

-- Nicolas Cueto