mark.js

function markQuiz() {
  var x = document.getElementById("quiz");
  var text = [x.length];
  var i;
  for (i = 0; i < x.length ;i++) {
	  var val = x.elements[i].value;
	  if (val == "on") {
		var ans = x.elements[i].checked;
	  } else {
	  	var ans = val;
	  }
	  text[i] = ans;
  }
  	var counter = 0;
	var correct = 0;
	var i;
	var lines = sessionStorage.getItem('quiz_data');
	lines = lines.split("$");
	var lastC = 0;
	for (i = 0; i < lines.length; i++) {
		var line = lines[i].split("+");
		var answer = line[line.length -1];
		var type = line[1];
		
		if (type == " ww ") {
			if (text[counter].toLowerCase().indexOf(answer.trim()) > -1) correct += 1;
			counter += 1;
		} else if (type == " wn ") {
			if (answer.trim() == text[counter]) correct += 1;
			counter += 1
		} else if (type == " rb ") {
			// TODO
			var iter = line[2].split(";").length;
			var j;
			var corr = false;
			for (j = 0; j < iter; j++) {
				var c = j+1;
				if (text[counter] && c == parseInt(answer)) corr = true;
				counter += 1;
			}
			if (corr) correct += 1;
		} else if (type == " cb ") {
			var iter = line[2].split(";").length;
			var j;
			var corr = true;
			var a = answer.split(";");
			for (var w = 0; w < a.length; w++) a[w] = parseInt(a[w]);
			for (j = 0; j < iter; j++) {
				var c = j+1;
				var d = a.indexOf(c) > -1;
				if (d && !text[counter]) {
					corr = false;
				}
				if (!d && text[counter]) corr = false;
				counter += 1;
			}
			if (corr) correct += 1;
		} else if (type == " img ") {
			type = line[3];

			if (type == " ww ") {
				if (text[counter].toLowerCase().indexOf(answer.trim()) > -1) correct += 1;
				counter += 1;
			} else if (type == " wn ") {
				if (answer.trim() == text[counter]) correct += 1;
				counter += 1
			} else if (type == " rb ") {
				// TODO
				var iter = line[4].split(";").length;
				var j;
				var corr = false;
				for (j = 0; j < iter; j++) {
					var c = j+1;
					if (text[counter] && c == parseInt(answer)) corr = true;
					counter += 1;
				}
				if (corr) correct += 1;
			} else if (type == " cb ") {
				var iter = line[4].split(";").length;
				var j;
				var corr = true;
				var a = answer.split(";");
				for (var w = 0; w < a.length; w++) a[w] = parseInt(a[w]);
				for (j = 0; j < iter; j++) {
					var c = j+1;
					var d = a.indexOf(c) > -1;
					if (d && !text[counter]) {
						corr = false;
					}
					if (!d && text[counter]) corr = false;
					counter += 1;
				}
				if (corr) correct += 1;
			}
		}
		
		if (correct > lastC) {
			var q = document.getElementById(i.toString(10));
			q.setAttribute('class', "correct");
			if (type == " ww " || type == " wn ") {
				var p = document.getElementById("ans" + i.toString(10));
				p.setAttribute('class', "hide");
			} else if (type == " rb ") {
				var a = document.getElementById(i.toString(10) + "rb" + answer.trim());
				a.setAttribute('class', "white");
			} else if (type == " cb ") {
				var b = answer.split(";");
				for (var qq = 0; qq < b.length; qq++) {
					var a = document.getElementById(i.toString(10) + "cb" + b[qq].trim());
					a.setAttribute('class', "white");					
				}
			}
		}
		else {
			var q = document.getElementById(i.toString(10));
			q.setAttribute('class', "wrong");
			if (type == " ww " || type == " wn ") {
				var p = document.getElementById("ans" + i.toString(10));
				p.setAttribute('class', "show");
			} else if (type == " rb ") {
				var a = document.getElementById(i.toString(10) + "rb" + answer.trim());
				a.setAttribute('class', "green");
			} else if (type == " cb ") {
				var b = answer.split(";");
				for (var qq = 0; qq < b.length; qq++) {
					var a = document.getElementById(i.toString(10) + "cb" + b[qq].trim());
					a.setAttribute('class', "green");					
				}
			}
		}
			
		lastC = correct;
	}
	
	var percent = correct / lines.length;
	percent = percent * 100;
	percent = Math.round(percent);
	percent = percent.toString(10) + "%";
	
	var score = document.getElementById("scorediv");
	score.setAttribute('class', "div");
	var scorre = document.getElementById("score");
	scorre.innerHTML = percent;
	
	document.body.scrollTop = 0;
  	document.documentElement.scrollTop = 0;

	
}