I want to know what is a "time out" time for a value sent by asp file. And how to change this time.

script which sends value to next asp file is like below

<a href="/scripts/test/test.asp?test=<%=test%>"></a>

Then next asp file receive and holds? the value like below

test = request.querystring("test")

How long this value is held when I leave this second asp page open for a while. It seems value vanishes in a time.