help regarding installing python documentation

惹火

> Hi
> I have installed the python 2.4 version and downloaded the HTML
> documentation also.
> But when I give the command help( ) in the IDLE command prompt and '
> while ' ,it says
>
> */Sorry, topic and keyword documentation is not available because the Python
> HTML documentation files could not be found. If you have installed them,
> please set the environment variable PYTHONDOCS to indicate their location./*
> *//*
> I don't know how to set the variable PYTHONDOCS .kindly help .[/color]

My operating system is Windows XP.Thanks