function getCookie(c_name)
{
	if (document.cookie.length > 0)
	{
		c_start = document.cookie.indexOf(c_name + "=");
		if (c_start!=-1)
		{
			c_start=c_start + c_name.length+1;
			c_end = document.cookie.indexOf(";", c_start);
			if (c_end == -1) c_end = document.cookie.length;
			return unescape(document.cookie.substring(c_start, c_end));
		}
	}
	return "";
}

function setCookie(c_name, value, expiredays)
{
	var exdate = new Date();
	exdate.setDate(exdate.getDate() + expiredays);
	document.cookie = c_name + "=" +escape(value) + ( (expiredays == null) ? "" : ";expires="+exdate.toUTCString() );
}

function checkCookie()
{
	c_name = 'zh_lang_check';

	c_lang_check = getCookie(c_name);
	if (c_lang_check == null || c_lang_check == "")
	{
		setCookie(c_name, "false", 365);
	}

	c_lang_check = getCookie(c_name);
	if (c_lang_check == "false")
	{
		// Hasn't had language check/redirect - set cookie, do check and redirect if Chinese language;
		setCookie(c_name, "true", 365);
		var lang = (navigator.language || navigator.systemLanguage || navigator.userLanguage || 'zh').substr(0, 2).toLowerCase();
		if (lang == "zh") window.location = "http://www.aquacrete.com.au/aquacrete-china/";
	}
}

checkCookie();