var lang = "en";
var fileName;
var fileExt;

function switchLang(){
	detectLang();
	var url;
	
	if(lang == "fi"){
		url = fileName.substring(0, (fileName.length - 3)) + "." + fileExt;
	}
	else{
		url = fileName + "_fi." + fileExt;
	}
	
	window.location = url;
}


function detectLang(){
	var currentLocation = "" + window.location;
	var pathArray = currentLocation.split("/");
	var file = pathArray[(pathArray.length - 1)];
	
	var fileArray = file.split(".");
	
	if(fileArray.length == 2){
		fileName = fileArray[0];
		fileExt = fileArray[1];
	}
	else{
		fileName = "index";
		fileExt = "htm";
	}
	
	
	if(fileName.substring((fileName.length - 3), fileName.length) == "_fi"){
		lang = "fi";
	}
	else{
		lang = "en";
	}
}