Forums Scripts & Popups Major Noob question

   ;if user is an op set the greet
  if ($nick == isop) {
    //set -sn %greet $$1 $2 $3 
    /say 0Greeting Message set!
    /say Greeting Message is now: %greet
  }
  ;if not tell them so
  else {
    //msg $nick 4You're not a channel operator!
  }
}

 ;if user is an op set the greet
  if ($nick isop $chan) { //set -sn %greet $$1 $2 $3 | /say 0Greeting Message set! | /say Greeting Message is now: %greet }
  else { //msg $nick 4You're not a channel operator!  } 

 on *:TEXT:!greetset*:{  
 ;if user is an op set the greet  if 
($nick isop $chan) 
{ //set -sn %greet $$1 $2 $3 | /say 0Greeting Message set! | /say Greeting Message is now: %greet }  
else { //msg $nick 4You're not a channel operator!  } }  

 * No such identifier: $chan) (line 4, script.ini)
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* You are not on a channel (line 4, script.ini)
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($NICK Unknown command
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* You are not on a channel (line 4, script.ini)