var langcodes=["ca", "en"];

var langCode = navigator.language || navigator.userLanguage;
var lang = langCode.toLowerCase();
lang = lang.substr(0,2); 
var dest = window.location.href; 
for (i=langcodes.length-1;i >= 0; i--)
{
	if (lang==langcodes[i])
	{
		if (dest.search(/.html/)>=0)
			dest = dest.substr(0,dest.lastIndexOf('.')) + '-' + lang.substr(0,2) + dest.substr(dest.lastIndexOf('.'));
		else 
			dest = dest+'index-'+ lang.substr(0,2) + '.html';							//URL no te nom de fitxer
		window.location.replace ?window.location.replace(dest) :window.location=dest;
	}
}