Log in/out Tipjar script

Looking for a script to allow staff to log in/out of tipjars with a % cut. So far i have this for personal use but dont know the rest!

integer totaldonated;
string owner;

default
{
on_rez( integer sparam )
{
llResetScript();
}
state_entry()
{
owner = llKey2Name( llGetOwner() );
llSetText( owner + "'s Donation Jar.\nClub Euphoria \nOS$0 Donated so far",<.25,1,.65>,1);
}

money(key id, integer amount)
{
totaldonated += amount;
llSetText( owner + "'s Donation Jar.\nClub Euphoria\nOS$" + (string)amount + " Was donated last!\n" + "$L" + (string)totaldonated + " Donated so far",<.25,1,.65>,1);
llInstantMessage(id,"Thanks for the donation!";
llInstantMessage(llGetOwner(),(string)llKey2Name(id)+" donated $" + (string)amount);
}
}