Please review my code to Search Student Records [JavaScript]

 var student, counter;
var students = [ 
  { 
   name: 'Dave',
    track: 'Front End Development',
    achievements: 158,
    points: 14730
  },
  {
    name: 'Jody',
    track: 'iOS Development with Swift',
    achievements: '175',
    points: '16375'
  },
];    

do {
  var search = prompt("Search for a student record or type 'quit' to exit");
  counter = 0; //Counter increments when record does not match through out the loop and is used to generate "Student record not found message"

    for(i=0; i<students.length; i++){
        student = students[i];   // Storing the index of Students array in variable student
        var studentk = student.name.toLowerCase();
        var searchk = search.toLowerCase();

        if(searchk == studentk){
          document.write( '<h2>Student: ' + student.name + '</h2>');
          document.write ('<p>Track: ' + student.track + '</p>');
          document.write( '<p>Points: ' + student.points + '</p>');
          document.write( '<p>Achievements: ' + student.achievements + '</p>');
          break;
        } else if(searchk == 'quit'){
          alert("Exiting the Search Function");
          break;
        } else if(searchk!= studentk){
          document.write("Searching...   ");
          counter+= 1;
        }  
    } //End of  For Loop

  if(searchk == 'quit'){
    break;
  }else if(counter == students.length){
    alert("Sorry no student record found");
  }
} while(true);