Need some help with JavaScript

I am creating a course that is a new hire "check-in" for a weekly update on progress.  Essentially each week the learner will log in and complete a short status update on specific categories with their supervisor.  Here is my JS, but i just simply doesn't run.  Any help would be appreciated!

 

var player = GetPlayer();

var email = "myemail@email.com";

var subject = "SSE Day 1" ;

var ee_id = Player.GetVar(EEIDNumber);

var Super = Player.GetVar(SupervisorName);

var Super_ID = Player.GetVar(Super_ID);

var Safety = Player.GetVar(Safety_Rating);

var Instructions = Player.GetVar(Inst_Rating);

var Productivity = Player.GetVar(Productivity_Rating);

var Teamwork = Player.GetVar(Teamwork_Rating);

var Proff = Player.GetVar(Proff_Rating);

var Feedback = Player.GetVar(Feedback);

var body_start = "The following answers are from the course";

var body_middle1 = "EE ID: ";

var body_middle2 = "Supervisor Name: ";

var body_middle3 = "Supervisor ID: ";

var body_middle4 = "Safety Rating: ";

var body_middle5 = "Following Instructions: ";

var body_middle6 = "Productivity: ";

var body_middle7 = "Teamwork: ";

var body_middle8 = "Professionalism: ";

var body_middle9 = "Feedback: ";

var cr = "\n";

var body_end = "Please save these answers in an email folder for future reference.\n";

var mailto_link = 'mailto:' +email+'?subject='+subject+'&body='+encodeURIComponent(body_start +body_middle1 +EE_ID +cr +body_middle2 +Super +cr +body_middle2 +Super +cr +body_middle3 +Super_ID +cr +body_middle4 +Safety +cr +body_middle5 +Instructions +cr +body_middle6 +Productivity +cr +body_middle7 +Teamwork +cr +body_middle8 +Proff +cr +body_middle9 +Feedback +cr + body_end);

win = window.open(mailto_link, 'emailWin')