/* Cookie Creator */
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}


/* Cookie Reader */
function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i = 0; i < ca.length; i++) {
		var c = ca[i];
		while (c.charAt(0) == ' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

/* Disable Select Group */
function disableSelect(form, group, optionSelected) {
	var cookie = readCookie('crAns');
	for (var i = 0; i < form.elements.length; i++) {
		if (form.elements[i].name == group) {
			form.elements[i].disabled = "true";
		}		
  	}
	var identity = document.getElementById("v"+cookie);
	identity.className = "correctAnswer";
	document.getElementById("choice").value = optionSelected;
}