function pl(){
	var url=location.href;
	url=url.replace(/indexgb/,"index");
	location.replace(url);
}

function gb(){
	var url=location.href;
	if(url.search("index")==-1) url=url.concat("index.php"); 
	url=url.replace(/index/,"indexgb");
	location.replace(url);
}