Drop in/ Drop out Co-op

I am trying to make it so that when you press the Start button on the Xbox Controller, it brings up a menu with various options, when you click the Co-op Mode button, it instantiates a second character and makes the camera take up half the screen, and has a second camera take up the other half. but when I click the button, it doesn't change the camera size. I can't figure it out.

1. #pragma strict
2. varSplit:boolean=false;
3. varTurnOnGUI:boolean=false;
4. var camOne :boolean;
5. var camTwo :boolean;
6. functionStart(){
7. Camera.main.rect =newRect(0,0,1,1);
8. }
9. functionUpdate(){
10. if(Input.GetButtonDown("Start_1")){
11. if(TurnOnGUI==false){
12. TurnOnGUI=true;
13. }
14. elseif(TurnOnGUI==true){
15. TurnOnGUI=false;
16. }
17. }
18. }
19. functionSwitch(){
20. if(Split==false){
21. if(camOne ==true){
22. Camera.main.rect =Rect(0,0,.5,1);
23. Split=true;
24. Debug.Log("Two Player");
25. WaitForSeconds(1);
26. }
27. if(camTwo ==true){
28. Camera.main.rect =Rect(.5,0,.5,1);
29. Split=true;
30. Debug.Log("Two Player");
31. WaitForSeconds(1);
32. }
33. }
34. elseif(Split==true){
35. if(camOne ==true){
36. Camera.main.rect =Rect(0,0,1,1);
37. Split=false;
38. Debug.Log("One Player");
39. WaitForSeconds(1);
40. }
41. }
42. }
43. functionOnGUI(){
44. if(TurnOnGUI==true){
45. if(camOne ==true){
46. if(GUI.Button(Rect(Screen.width *.1,Screen.height *.2,Screen.width *.3,Screen.height *.1),"Continue")){
47. TurnOnGUI=false;
48. }
49. if(GUI.Button(Rect(Screen.width *.1,Screen.height *.35,Screen.width *.3,Screen.height *.1),"Co-op Mode")){
50. Switch();
51. TurnOnGUI=false;
52. }
53. GUI.Button(Rect(Screen.width *.1,Screen.height *.5,Screen.width *.3,Screen.height *.1),"Settings");{
54. }
55. GUI.Button(Rect(Screen.width *.1,Screen.height *.65,Screen.width *.3,Screen.height *.1),"Credits");{
56. }
57. GUI.Button(Rect(Screen.width *.1,Screen.height *.8,Screen.width *.3,Screen.height *.1),"Quit");{
58. Application.Quit();
59. }
60. }
61. }
62. else{
63. }
64. }