function onPre(){
	var page_now = page-1;
	if(page_now<=0){
			return location.href="showzxzc.do?thread=1&functionid="+functionid;
	}
	return location.href="showzxzc.do?thread="+page_now+"&functionid="+functionid;
}
function onNext(){
	var page_now = page+1;
	if(page_now>size){
		return location.href="showzxzc.do?thread="+size+"&functionid="+functionid;
	}
	return location.href="showzxzc.do?thread="+page_now+"&functionid="+functionid;
}