var g_pageLang;
var langParam = getURLParam('lang');

// don't like to use JS for lang detect but...
function decideLang() {
	if (langParam != "") {
		// stay
	} else {
		// detect browser's language
		var sLang = navigator.language || navigator.browserLanguage;
		
		if ( (sLang == 'ja' || sLang == 'ja-jp' || sLang == 'ja-jp-mac') && g_pageLang == 'ja') {
			// do nothing
			//alert(sLang);
		} else {
			//alert(sLang);
			if (g_pageLang != 'en') {	
				document.location.replace("index_e.html");
			}
		}
	}
}

// function to get individual URL parameters
function getURLParam (name) 
{	
	name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
	
  	var regexS = "[\\?&]" + name + "=([^&#]*)";
  	var regex = new RegExp(regexS);
  	var results = regex.exec(window.location.href);
  	
  	if (results == null) {
   		return "";
  	} else {
    	return results[1];
  	}
}