function getCookie(name) {
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	if (begin == -1) {
		begin = dc.indexOf(prefix);
		if (begin != 0) return null;
	}
	else begin += 2;
	var end = document.cookie.indexOf(";", begin);
	if (end == -1) end = dc.length;
	return unescape(dc.substring(begin + prefix.length, end));
}
function setCookie(n, v, p, t){
	now = new Date();
	now.setTime(Date.parse(now) + t);
	document.cookie =  n+'='+escape(v)+';PATH='+p+';EXPIRES='+now.toUTCString();
	if (!getCookie(n)) return false;
	else return true;
}
var ua = navigator.userAgent;
var checker = {
	iphone: ua.match(/(iPhone|iPod|iPad)/),
	blackberry: ua.match(/BlackBerry/),
	android: ua.match(/Android/)
};