function changeVer(lang) {

	chi_path = "/chi/";
	eng_path = "/eng/";
	sim_path = "/sim/";

	org_path=window.location.pathname;

	if (org_path.indexOf(chi_path) != -1) {
		org_lang_path = chi_path;
		div_path = chi_path;
	} else if (org_path.indexOf(sim_path) != -1) {
		org_lang_path = sim_path;
		div_path = sim_path;
	} else {
		org_lang_path = eng_path;
		div_path = eng_path;
	}

	if (lang == 'e') {
		des_lang_path = eng_path;
	}

	if (lang == 's') {
		des_lang_path = sim_path;
	}	

	if (lang == 'c') {
		des_lang_path = chi_path;
	}

	tail = org_path.replace(org_lang_path, des_lang_path);	

	window.location.href =  tail;
}