basic javascript quiz [closed]

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I have been given this code as an example to create a basic JavaScript qu开发者_JS百科iz:

var Question = function(id, text, correct, incorrect) {
    this.id = id;
    this.text = text;
    this.correct = correct;
    this.isCorrectlyAnswered = false;
    this.all = incorrect;
    this.all.push(correct);
    this.all.sort(randomSort);
}

Question.prototype.write = function() {
    var qu = document.getElementById("questions");
    qu.innerHTML += "<p>"+this.text+"</p>";

    var questionList = "<ul class='questionlist'>";
    for (var i=0; i<this.all.length; i++) {
        if ( this.all[i] == this.correct ) {

            questionList += "<li><label onclick='right("+this.id+")'><input type='radio' name='"+this.id+"'>"+this.all[i]+"</input></label></li>";

        } else {

            questionList += "<li><label onclick='wrong("+this.id+")'><input type='radio' name='"+this.id+"'>"+this.all[i]+"</input></label></li>";
        }
    }
    questionList += "</ul>";
    qu.innerHTML += questionList;
}

I have been baffled by this. Can anyone help me break down the code into 'understandable' chunks?

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The code defines a Javascript class used for object oriented programming. You can say

 var q = new Question(.......);

with suitable parameters, and call the function

 q.write();

You can read more about the (slightly odd) way OOP works i JS: http://mckoss.com/jscript/object.htm