function setLanguageCookie(LG){
	document.cookie = "lang="+LG;
	window.location.href = "html_works.html";
}

function getLanguageCookie(){
	var language;
	var allCookieData = document.cookie;
	var num = allCookieData.indexOf("lang=");
	if(num==-1){
		language = "JP";
	}else{
		language = allCookieData.substr(num+5,2);
	}
	//
	if(language=="JP" && document.getElementById("lang_JP")){
		document.getElementById("lang_EN").style.display = "none";
		document.getElementById("lang_JP").style.display = "block";
	}else if(language=="EN"){
		if(document.getElementById("lang_JP")){
			document.getElementById("lang_JP").style.display = "none";
			document.getElementById("lang_EN").style.display = "block";
		}
		
		document.getElementById("nav3").style.display = "none";
		document.getElementById("nav").style.width = "290px";
		document.getElementById("nav").style.marginLeft = "510px";
	}
	document.getElementById("nav").style.visibility = "visible";
}