function switchLang(currLang, tarLang){

	var currPath = document.URL.toString();
	var lang = window.location.hostname;
	var head, toPath;
	toPath = "";
	
	// 1 = English, 2 = Chinese, 
    if (currLang==1)
	{		
		if (tarLang==2)
		{
			currPath = currPath.replace("/eng/", "/chi/");
			currPath = currPath.replace(".php", ".php");
			
			toPath = currPath;
			location = toPath;
		}}}