var locapath = document.location.href

len = locapath.length -1;
chr = locapath.substring(len,locapath.length);
if (chr=="/")
{
	locapath = locapath + "index.html";
}


org_path_start = locapath.indexOf("://") + 3;
org_path_end = locapath.length;
domain = locapath.substring(org_path_start, org_path_end);
if (domain.toString().search('/')!= -1){
org_path_start = 0;
org_path_end = domain.indexOf("/");
domain = domain.substring(org_path_start, org_path_end);
}


var atlang,domname,sitepath,atgb,atindex,org_part;
	sc_path = "sc_chi/";
	tc_path = "tc_chi/";
	en_path = "eng/";
	atgb = false;
	atindex = false;

if (locapath.toString().search('/gb/')!= -1){
	atgb = true;
	org_path_start = locapath.indexOf("/gb/") +4;
	org_path_end = locapath.length;
	sitepath = locapath.substring(org_path_start, org_path_end);
}else{
	atgb = false;
	sitepath = locapath.substring(7,locapath.length);
}


if (locapath.toString().search('/eng/')!= -1){
	atlang = "en";
	org_part = en_path;
}else
if (locapath.toString().search('/tc_chi/')!= -1){
	atlang = "tc";
	org_part = tc_path;
}else
if (locapath.toString().search('/sc_chi/')!= -1){
	atlang = "sc";
	org_part = sc_path;
}else
if (locapath.toString().search('/index.html')!= -1){
	atlang = "eindex";
	org_part = "/index.html";
	atindex = true;
}else
if (locapath.toString().search('/cindex.html')!= -1){
	atlang = "cindex";
	org_part = "/cindex.html";
	atindex = true;
}else
if (locapath.toString().search('/scindex.html')!= -1){
	atlang = "sindex";
	org_part = "/scindex.html";
	atindex = true;
}

function chglang(lang){

	switch(lang){
		case 'entxt': 
			des_part = entxt_path;
			des_ind_part = "textonly/index.html";
			base_path = "http://";
			break;
		case 'tctxt':
			des_part = tctxt_path;
			des_ind_part = "textonly/cindex.html";
			base_path = "http://";
			break;
		case 'sctxt':
			des_part = sctxt_path;
			des_ind_part = "textonly/scindex.html";
			//base_path = scserver;
			base_path = "http://";
			break;
		case 'en':
			des_part = en_path;
			des_ind_part = "/index.html";
			base_path = "http://";
			break;
		case 'tc':
			des_part = tc_path;
			des_ind_part = "/cindex.html";
			base_path = "http://";
			break;
		case 'sc':
			des_part = sc_path;
			des_ind_part = "/scindex.html";
			//base_path = scserver;
			base_path = "http://";
			break;
	}

	if (atindex == true){

		tail = sitepath.replace(org_part, des_ind_part);
	}else{
		tail = sitepath.replace(org_part, des_part);
	}

//alert(base_path+tail)
	window.location =  base_path+tail;

}