function switch_language(lang) {
	var url = String(document.location);
	var pos1 = url.lastIndexOf("?");
	if (pos1 == -1 ) {
		if (lang == "c") {
			x = url.lastIndexOf("/e_");
		}
		else {
			x = url.lastIndexOf("/c_");
		}		
	} else {
		url1 = url.substring(0,pos1);
		if (lang == "c") {
			x = url1.lastIndexOf("/e_");
		}
		else {
			x = url1.lastIndexOf("/c_");
		}
	}
	l = url.length;	
	fname = String(url.substring(x + 2,l));
	path = String(url.substring(0, x + 1));

	if (path == "") {
		new_url = "c_index.html";
		document.location = new_url;
	}
	else {
		lp = path.length
		y = path.lastIndexOf("/careers/");
		last_dir = String(path.substring(y, lp));
		if (last_dir == "/careers/") {
			alert("Sorry.  No chinese version is available!!!");
		}
		else {
			if (lang == "c") {
				new_url = path + "c" + fname;
			}
			else {
				new_url = path + "e" + fname;
			}
			document.location = new_url;
		}		
	}

}