// JavaScript Document - Barbara Nelson - see credits
<!--UNLESS OTHERWISE INDICATED, THE EXERCISES ON THE SPANISH GRAMMAR SITE ARE COPYRIGHTED BY Barbara Kuczun Nelson © 1997-2001(bknelson@colby.edu), AND MAY NOT BE REPRODUCED, ALTERED, OR REDIRECTED WITHOUT THE EXPLICIT WRITTEN PERMISSION OF THE AUTHOR. IT CAN ONLY BE USED FOR NON-COMERCIAL EDUCATIONAL PURPOSES PROVIDED THAT THIS ORIGINAL NOTICE IS KEPT IN THE SCRIPT AND PROPER RECOGNITION IS GIVEN IN A VISIBLE PART OF THE WEB PAGE. -->

function modo(Student, Correct) {
var studentAnswer = Student.value;
var correctAnswer = Correct;
result = ""
for (var c = 0; c< correctAnswer.length; c ++) {
        var CorrectX = correctAnswer.charAt(c);
        var StudentX = studentAnswer.charAt(c);
        if (CorrectX == StudentX) {
        result = result + CorrectX;
        }
        else {
        result = result +  "=";
        }
}
Student.value = result;
}