// JavaScript Document
function hideAndShow(whatToshow) {
    var numOfQ = document.getElementById('ContentPlaceHolder1_txtNumOfQ').value;
    for (i = 1; i < numOfQ; i++) {	
		var hide = document.getElementById('answer'+i);
		hide.style.display = "none";
	}
	var show = document.getElementById(whatToshow);
	show.style.display = "block";
}