function doLangToFr(AUrl)
{
	var lastSlash = AUrl.lastIndexOf("/")+1;
	var resultUrl = AUrl.substr(0,lastSlash) +  AUrl.substr(lastSlash+3);
	
	return resultUrl;
}

function doFrToLang(AUrl,ALang)
{
	var lastSlash = AUrl.lastIndexOf("/")+1;
	var Page = AUrl.substr(lastSlash); 
	if (Page == "")
	  Page = "index.php";
	var resultUrl = AUrl.substr(0,lastSlash) + ALang + "_" + Page;
	
	return resultUrl;
}

function langToFr() 
{
	window.top.location.href = doLangToFr(window.top.location.href);
}

function frToLang(ALang) 
{
	window.top.location.href = doFrToLang(window.top.location.href, ALang);
}