function goto_language(destination_language)
		{
languages = new Array('rus', 'ukr', 'eng', 'jpn')
current_url = new String(location.href)
i=-1
do {
	i+=1; 
	position = current_url.search('/' + languages[i] + '/');
} while (position<0 && i<languages.length-1)

location = current_url.replace('/' + languages[i] + '/','/' + destination_language + '/')
		}