<html>
<script>
var objXmlHTTP,objXmlDOM;
var aQuest; //to store question ids
var aAnswer = new Array(); // to track the result
var aSelected = new Array(); // to store user's response
var count = 0; //to store the current question no
var ansSel = 0; //to store user's selection
var ExamDuration = 5 * 60 ; // 5 minutes
var timerID; //to store the setInterval fun's id
var radIndex = -1; //to store the selected radio's index
//constructor like function
//here XML objects are created and
//No of questions as well as question ids list
//are fetched from the server.
function init(){
objXmlHTTP = new ActiveXObject("Microsoft.XMLHTTP");
objXmlDOM = new ActiveXObject("Microsoft.XMLDOM");
objXmlHTTP.open("POST","OLExam.asp?Action=Start",false);
objXmlHTTP.send("");
temp =objXmlHTTP.ResponseText;
aQuest = temp.split(",");
//initialize the user's answers list
for(i=0;i<aQuest.length; i++){
aAnswer[i] = 0; // 0 for wrong; 1 for right answer
aSelected[i] = -1; // to store the radio's index
}
//parse the response content fetched from the server
//and display the question
parseQ();
}
//change the Start button's caption and its click event
document.frm.btnFinish.value = "Finish the Exam";
document.frm.btnFinish.onclick = showResult; //function
//start the timer
timerID = setInterval("timer()",1000);
}
function getPreQ() {
//update the user's answers list
checkAnswer();
//decrement the question no - i.e. to previous Question
count--;
//stop the timer
clearInterval(timerID);
//fetch the question for the aQuest[count] id
url = "OLExam.asp?Action=NextQ&QNo=" + aQuest[count];
objXmlHTTP.open("POST",url ,false);
objXmlHTTP.send("");
objXmlDOM.loadXML(objXmlHTTP.ResponseText);
//parse the response content fetched from the server
//and display the question
parseQ();
//start the timer
timerID = setInterval("timer()",1000);
}
function getNextQ() {
//update the user's answers list
checkAnswer();
//increment the question no - i.e. to next Question
count++;
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