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

function checkme() {
size1 = document.supernovae.answer1.value - 0;
if (!size1) {size1 = "Blank";}
size2 = document.supernovae.answer2.value - 0;
if (!size2) {size2 = "Blank";}
size3 = document.supernovae.answer3.value - 0;
if (!size3) {size3 = "Blank";}
size4 = document.supernovae.answer4.value - 0;
if (!size4) {size4 = "Blank";}
    
    
    RightAnswer1 = 100;
    RightAnswer2 = 1000;
    RightAnswer3 = 10000;
    RightAnswer4 = 4000;
    
    NumberCorrect = 0;
    Extra = 0;
    AnswerPage = 'supernovae_solution.html';
    
    if (size1 == RightAnswer1) {
        NumberCorrect++;
    }
    if (size2 == RightAnswer2) {
        NumberCorrect++;
    }
    if (size3 == RightAnswer3) {
        NumberCorrect++;
    }
    if (size4 == RightAnswer4) {
        Extra++;
    }
    
    if (Extra == 1) {
	alert ("You answere " +NumberCorrect + " out of 3 questions correctly and got the bonus question!");
    }
    else {
    	alert ("You answered " +NumberCorrect + " out of 3 questions correctly!");
    }
    if (NumberCorrect==3) {
      location = AnswerPage; 
    }
}

function answerButton() {
size1 = document.supernovae.answer1.value - 0;
if (!size1) {size1 = "Blank";}
size2 = document.supernovae.answer2.value - 0;
if (!size2) {size2 = "Blank";}
size3 = document.supernovae.answer3.value - 0;
if (!size3) {size3 = "Blank";}
size4 = document.supernovae.answer4.value - 0;
if (!size4) {size4 = "Blank";}
    
    
    RightAnswer1 = 100;
    RightAnswer2 = 1000;
    RightAnswer3 = 10000;
    RightAnswer4 = 4000;
    
    NumberCorrect = 0;
    Extra = 0;
    AnswerPage = 'supernovae_solution.html';
    
    if (size1 == RightAnswer1) {
        NumberCorrect++;
    }
    if (size2 == RightAnswer2) {
        NumberCorrect++;
    }
    if (size3 == RightAnswer3) {
        NumberCorrect++;
    }
    if (size4 == RightAnswer4) {
        Extra++;
    }
    
    //    if (Extra == 1) {
    //	alert ("You answered " +NumberCorrect + " out of 3 questions correctly and got the bonus question!");
    //    }
    //    else {
    //    	alert ("You answered " +NumberCorrect + " out of 3 questions correctly!");
    //    }
    location = AnswerPage; 
}