JAVASCRIPT FOR ONLINE QUIZ

i m creating a set of online questionnaire consist of 12 questions with choice of answers from 0-6.i've done creating a html codes.but have to calculate percentage based on total scores.my problem is i want to use get element by id function to read the score.if any questions is missed out there must be an alert box require user to answer all questions before proceeding to calculate score.below is a sample of questionnaire which i need to modify to include get element id function.I REALLY NEED YOUR HELP IN THIS.PLS

<form method="GET" action="post.html">`print("code sample");`

    Choose one from this group<br>
    RED <input type = "radio" name = "rad1" value = "0" >
    BLUE <input type = "radio" name = "rad1" value = "1" >
    GREEN  <input type = "radio" name = "rad1" value = "2" >
    YELLOW <input type = "radio" name = "rad1" value = "3">
    BROWN <input type = "radio" name = "rad1" value = "4">
    <br>
    And one from this group<br>
    PINK<input type = "radio" name = "rad2" value = "0" >
    PURPLE<input type = "radio" name = "rad2" value = "1" >
    GREY<input type = "radio" name = "rad2" value = "2" >
    BLACK<input type = "radio" name = "rad2" value = "3" >
    WHITE <input type = "radio" name = "rad2" value = "4">
    <br><br>
    <input type = "button" value = "Calculate Score" onclick ="calc()">
    </form>

    <script type = "text/javascript">

    var numOfGroups = 2;  // the number of radio button groups - here 2

    function calc() {
    var score = 0;
    for (var j=1; j<=numOfGroups; j++) {
    var f = document["myform"]["rad"+j];
    for (var i=0; i<f.length; i++) {
    if (f[i].checked) {
    score += Number(f[i].value/72 *100));
    }
    }
    }

    alert ("You scored "  + score);

    }
    </script>

May 26, 2013 at 2:25 PM

You can check this link. Everything has been explained stepwise and you can implement the score in percentage. The source code is also available there. Your problem will be solved within minutes. Interactive Quiz with javaScript

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