// JavaScript Document\
function switchlang(lang){
	var startpos = (location.href.lastIndexOf('/')+1);
	var len = location.href.length;	 
	var url = location.href;		
	var fileName =	url.substring(startpos, len);	
	var newUrl;
		
	if(lang == "th")
	{
		//var foldername = "th";
		var numpos = url.indexOf("/th/");
		if(numpos == -1)
		{			
			newUrl =  lang + "/" + fileName;
		}
		else
		{
			var newPath =	url.substring(0, startpos-3);
			newUrl =  newPath + lang + "/" + fileName;
		}
		
		location.href = newUrl;
	}	
	else if(lang == "")
	{
		var newPath =	url.substring(0, startpos-3);
		//newUrl =  newPath + "demo" + "/" + fileName;
		newUrl =  newPath + lang + "" + fileName;
		location.href = newUrl;
	}
	return true;
}