Help with applescript/mounting a server.

Looking for help!
I am in charge of writing an applescript for my job. I am JUST starting to learn applescript.
Can anyone help me?
I need to write an AppleScript that once the computer starts up it
opens to a a User login screen.
Also allow my students on a Macintosh to login and connect to a Novell Server using Native File Access.

The script that I need (I think) is

Tell Finder to open chooser
Tell chooser to open appleshare
Tell appleshare to enter and open server IP address (172…)
launch login screen
(User types in name)
Connect to Server
Mount server
log out to desktop and reopen a new user login screen without shutting down computer.

Needless to say being a newbie I am a bit lost.

If I can figure this out the school will keep the macintosh’s.
Any help greatly appreciated.

Here are two separate scripts, one for login, one for logout. Based on your post I assumed you wanted a script that you’d put in the startup folder and prompt the user for a password to log into a volume via IP. The second script checks to see if that volume is mounted and if it is - put’s it away. Tested successfully on Mac 9.2 Applescript V 1.6

Log In–save as an application and put in startup folder, or if users need to run put in AppleMenu or something

--If the users can run the log in script at any time manually...

-- check to see if volume is already mounted
set VolumeName to "Volume Name" as string
set DiskList to list disks --get all disks currently mounted --unimportant if this is strictly a script that is run on startup

if DiskList contains VolumeName then --
	tell application "Finder"
		activate --bring the Finder to the front so the dialog isn't hidden
		display dialog VolumeName & " is already mounted" buttons {"Okay"} default button 1 with icon stop
	end tell
	login() of me --invoke the login subroutine
end if

--if this is strictly a startup script delete everything prior to this and enable the next line
--login() of me --invoke the login subroutine

--log in subroutine
on login()
	--to prompt a user for a password
	--set ValidPassword to "macuser" --this is the password it has to match
	--or set up a group of users 
	set ValidPassword to {"Rob", "JJ", "David", "HAS", "Ray", "TJ"}
	tell application "Finder"
		activate --bring the Finder to the front so the dialog isn't hidden
		set Dialogin to display dialog "Please enter your password" default answer "" with icon stop
		set UserEntry to the text returned of Dialogin
		set ButtonReturned to the button returned of Dialogin
	end tell
	--check to see if the user cancelled
	if ButtonReturned = "Cancel" then --the user cancelled
		return --end the script
	end if
	if ValidPassword contains UserEntry then --if your password, or list of passwords/users contains what the user entered - log in
			--this is how you mount a volume via IP
			mount volume "afp://server.IP.address/Volume Name" as user name "username" with password "password"
		on error number errmsg --if some error occurs let the user know
			tell application "Finder"
				display dialog "A login error occurred." & return & "Error: " & errmsg buttons {"Okay"} default button 1 with icon note
			end tell
		end try
		tell application "Finder"
			display dialog UserEntry & " is not a valid password." buttons {"Cancel", "Try Again"} default button 2 with icon note
		end tell
		if the button returned of the result = "Try Again" then
			--run the script again
			login() of me
		end if
	end if
end login

Log Out

--to log out, specify the volume name you want to put away
set VolumeName to "Volume Name:" as string--be sure to end with ":"

	set alsVolumeName to VolumeName as alias --see if it is mounted before trying to put away
	tell application "Finder"
			put away alsVolumeName
		on error
			display dialog "There was a problem trying to put " & VolumeName & " away." buttons {"Bummer"} default button 1 with icon note
		end try
	end tell
on error --if it isn't there
	tell application "Finder"
		display dialog "The Volume " & VolumeName & " was not mounted." buttons {"Okay"} default button 1 with icon note
	end tell
end try

The Log in script is not meant to be strong security by any stretch of the imagination. It can be easily cracked - but for a simple user log in - it works.

*If you run the log-out script in a script editor it will most likely ask you to log into the remote server when it finishes. It will not do this if it is saved as an application.

Hope this helps!