function SwitchLanguage(desiredLang)
{
	var actualLang = document.location.href.indexOf("lang=");
	
	if(actualLang!=-1)
	{
		var actualLangString = document.location.href.substr(actualLang,10);
		document.location.href = document.location.href.replace(actualLangString,"lang=" + desiredLang);
	}
	else
	{
		var questionMark = document.location.href.indexOf("?");
		if(questionMark==-1)
		{
			document.location.href = document.location.href + "?lang=" + desiredLang;
		}
		else
		{
				document.location.href = document.location.href + "&lang=" + desiredLang;
		}
	}
}