function swaplanguage(lang) {  
	if (lang == "cn") {
		lang = "tc"
	}
	if (lang == "en") {
		origin = "tc"
	} else {
		origin = "en"
	} 
	
	str = "\/" + origin + "\/";
	replaceStr = "\/" + lang + "\/";
		
	now = new String(document.URL);
	newString = now.replace(str,replaceStr);
	//alert (str + "\n" + replaceStr + "\n" +  now + "\n" + newString);
	
	top.location = newString;
	
}