/**
 * Easily enable language switching on static website
 * @author Ian Chu
 * By default, just make copy of English version files
 * with appending "_cht" and "_chs" on filename to be
 * Trad-Chinese and Simp-Chinese version files.
 * It will handles the switching with the algorithm.
 */
function setlang(localeCode) {
	var filename, filext;
	filename = location.href;
	filename = filename.substr(filename.lastIndexOf("/")+1);
	filext = filename.substr(filename.lastIndexOf("."));
	filename = filename.substr(0,filename.lastIndexOf("."));
	if (filename.lastIndexOf("_") >= 0) filename = filename.substr(0,filename.lastIndexOf("_"));
	switch(localeCode.toLowerCase()) {
	case "en":
		break;
	case "zh_tw":
		filename = filename + "_cht";
		break;
	case "zh_cn":
		filename = filename + "_chs";
		break;
	}
	filename = filename + filext;
	location.assign(filename);
}