text: var role = document.getElementById('inputRole');
  role.onchange = function(){
      if((this.value !== 'Student')){
          document.getElementById('inputLevel').disabled = true;
          document.getElementById('inputGPA').disabled = true;
  
      }else{
          document.getElementById('inputLevel').disabled = false;
          document.getElementById('inputGPA').disabled = false;
      }
  
      if(this.value !== 'Instructor'){
          document.getElementById('inputEducation').disabled = true;
      }else{
          document.getElementById('inputEducation').disabled = false;
      }
  };
  