';' expected. Insert a semicolon at the end. already one there?

saying that its expecting one within the code but i cant find it as im still very new to javascript so can someone help me find the problem.

 #pragma strict
 var Level1=true;
 var Level2=true;
 var Back=true;
 
 function OnMouseEnter(){
    renderer.material.color=Color.red;
    }
    
 function OnMouseExit(){
    renderer.material.color=Color.white;
    }
    
 function OnMouseDown(){
 
    if(Level1==true){
    Application.LoadLevel(0);
    }
    
    else if(Level2==true){
    Application.LoadLevel(0);
    }
    
    else(Back==true){
    Application.LoadLevel(1);
    }
 }