How i check URL before i load page in asp?

HI..... i'm asp programer,

I want to show link according to thair login,user only acess site though thair given URL(i.e.abc.patel.yahoo.com)

Now i want to break url and perform authentication before page load,each user may have different page-link etc...,

Is it possible do all this thing before hosting a site on internet ?

meand perform all things only at local pc

How i check URL before i load page in asp?extension

You may want to request the server variables and see if you can work with those to solve your problem.

httpRefferer=Request.ServerVariable("H...

A complete list is at.

http://www.w3schools.com/asp/coll_server...

Hope that helps

RJ