function chLang(lang) {
	var currentPath=location.href.toString();
	var switchTc='/tc/';
	var switchEn='/en/';
	var switchSc = '/sc/';
	lang = '/'+lang+'/';

	switch (lang){
		case '/sc/':
			currentPath=currentPath.replace(switchTc, switchSc);
			currentPath=currentPath.replace(switchEn, switchSc);
			break;
		case '/en/':
			currentPath=currentPath.replace(switchTc, switchEn);
			currentPath=currentPath.replace(switchSc, switchEn);
			break;
		case '/tc/':
			currentPath=currentPath.replace(switchEn, switchTc);
			currentPath=currentPath.replace(switchSc, switchTc);
			break;
		default:
	}

	document.location=currentPath;
}