function changeLanguage(lang)
{
	var currentURL = new String(document.location.href); // get the full URL
	if (currentURL.indexOf('russian') > -1)
	{
		var regexp = /russian/g;
	}
	else 
	{
		var regexp = /english/g;
	}
	
	var newURL = currentURL.replace(regexp,lang);
	document.location.href = newURL;
}