Variables in GUI not updating/changing? (javascript)

I'm working in javascript and attempting to make a very simple battle system. The issue is, I have to declare the players' and monsters' health in an if statement (because there are different player classes and monsters), but whenever I do this once the calculations in the if statement are done (monsterHealth -= playerAttack) the monster health doesn't update because the condition of the if statement (the current monster's original stats) is still active. Does anyone know how I might fix this? (the problem happens both with the playerHealth and the monsterHealth).

This is the class for the monster stats:

 #pragma strict
 
 public class MonsterData extends MonoBehaviour
     {
         static public var monsterHealth : int;
           static public var monsterArmor: int;
         static public var monsterAttack : int;
           static public var curMonster : String;
         static public var totDamage1 : int = PlayerStats.strength + PlayerStats.weaponDamage1 - monsterArmor;
            static public var totDamage2 : int = PlayerStats.strength + PlayerStats.weaponDamage2 - monsterArmor;
            static public var monNum : Monster = new Monster(0);
            
         public class Monster
         {
                
             public function Monster(t : int)
                    {    
                    
                     totDamage1 = PlayerStats.strength + PlayerStats.weaponDamage1 - monsterArmor;
                     totDamage2 = PlayerStats.strength + PlayerStats.weaponDamage2 - monsterArmor;
         
             if(t == 1)
                 {
                     curMonster = "Mutated Wolf";
                     monsterHealth = 16;
                     monsterArmor = 2;
                     monsterAttack = (Random.Range(2, 4));
                 }
             }
         }
 }

And this is the GUI that runs the battle:

 if(GameGUI.gamestage == -201)
     {
         if(GameGUI.backNum == 4)
         {
             GUI.skin = nightText;
         }
         else
         {
             GUI.skin = text;
         }
         
         GUI.Box(Rect(Screen.width/2 - 250, Screen.height/2 - 300, 500, 500), Mon.curMonster);
         GUI.Box(Rect(Screen.width/2 - 250, Screen.height/2 - 250, 500, 500), "" + Mon.monsterHealth);
         
         GUI.Box(Rect(Screen.width/2 - 250, Screen.height/2 + 200, 500, 500), "Me");
         GUI.Box(Rect(Screen.width/2 - 250, Screen.height/2 + 250, 500, 500), "" + PlayerStats.playerHealth);
         
         if(GUI.Button(Rect(Screen.width/2 - 250, Screen.height/2 - 100, 500, 35), PlayerStats.attack1))
         {
             Mon.monsterHealth -= Mon.totDamage1;
             PlayerStats.playerHealth = PlayerStats.playerHealth - Mon.monsterAttack;
             Mon.monsterAttack = (Random.Range(2, 4));
         }
         if(GUI.Button(Rect(Screen.width/2 - 250, Screen.height/2 - 50, 500, 35), PlayerStats.attack2))
         {
             Mon.monsterHealth -= Mon.totDamage2;
             PlayerStats.playerHealth = PlayerStats.playerHealth - Mon.monsterAttack;
             Mon.monsterAttack = (Random.Range(2, 4));
         }
         
         if(Mon.monsterHealth <= 0)
         {
             Mon.monsterHealth = 0;
             Debug.Log("0");
         }
         
         if(PlayerStats.playerHealth == 0)
         {
             GameGUI.gamestage = -3;
         }
         
     }