var size1 = "Blank";
var size2 = "Blank";
var size3 = "Blank";
var size4 = "Blank";
var size4 = "Blank";

function testButton(form) {
size1 = document.atom.answer1.value;
if (!size1) {size1 = "Blank";}
size2 = document.atom.answer2.value;
if (!size2) {size2 = "Blank";}
size3 = document.atom.answer3.value;
if (!size3) {size3 = "Blank";}
size4 = document.atom.answer4.value;
if (!size4) {size4 = "Blank";}
size5 = document.atom.answer5.value;
if (!size5) {size5 = "Blank";}
    
    RightAnswer1 = /-3.4\s*eV/i;
    RightAnswer2 = /2.55\s*eV/i;
    RightAnswer3 = /3.4\s*eV/i;
    RightAnswer4 = /487\s*nm/i;
    RightAnswer5a = /blue/i;
    RightAnswer5b = /48[56789]\s*nm/i;

    NumberCorrect = 0;
    AnswerPage = 'xray_gen_atom_solution.html';
    
    if (RightAnswer1.test(size1)) {
        NumberCorrect++;
    }
    if (RightAnswer2.test(size2)) {
        NumberCorrect++;
    }
    if (RightAnswer3.test(size3)) {
        NumberCorrect++;
    }
    if (RightAnswer4.test(size4)) {
        NumberCorrect++;
    }
    if ((RightAnswer5a.test(size5)) || (RightAnswer5b.test(size5))) {
        NumberCorrect++;
    }
    
    alert ("You answered " +NumberCorrect + " out of 5 questions correctly!");
    location = AnswerPage; 
}