function is_connect_cardbuffet() {
	var _url = document.URL
	if(_url.indexOf("cardbuffet.com")<0) return false;
	else return true;
}
function is_chinese () {
	var lang = navigator.language || navigator.browserLanguage; 
	if(lang.indexOf("zh")<0) return false;
	else return true;
}

function change_lang(lang) {
	var form = document.getElementById("form1");
	var v = document.getElementById("l");
	v.value = lang;
	form.submit();
}