function chooseLanguage(old_lang,new_lang){
		var new_lang = "lang="+new_lang;
		var old_lang = "lang="+old_lang;
		//if(new_lang != old_lang && new_lang != 'lang=x'){
			//alert(new_lang);
			var old_url = String(document.location);
			document.location = old_url.replace(old_lang,new_lang);
		//}
}