function check(ths, checkname, noofcorrect) {
	var totalselected = 0;
	if (ths.checked) {
		for (i = 0; i < document.questionForm.length; i++) {
			e = document.questionForm.elements[i];
			if (e.type == "checkbox") {
				var c = e.name;
				var d = c.indexOf(checkname);
				if (c == checkname && e.checked == true) {
					totalselected++;
				}
			}
		}
		if (totalselected > noofcorrect && noofcorrect > 0) {
		
			if (noofcorrect ==1 ) {
				alert("Only " + noofcorrect + " Correct Answer can be selected");
			} else {
				alert("Only " + noofcorrect + " Correct Answers can be selected");
			}
			ths.checked = false;
		}
	}
}