Scheduling automatic Internet explorer login

Hi ,
I am using windows XP and IE8
I have my credentials stored for a website in internet explorer.
I want to implement below scenario.

 
 
I have entered both username/password for a website and left IE explorer open and locked my computer
I want the computer to login in that website automatically at a particular time say 7 pm.

is there any way to schedule this
thanks

I suppose it might work once if you could simulate hitting enter on the keyboard with that window in focus. It'd be easier with something like lynx and expect. Or with remote control sw like VNC you can do it remote!