function change_tab(tab_id)
{
	$('link_news').className = "";
	$('link_top_play_nhactre').className = "";
	$('link_top_play_rapviet').className = "";
	$('link_top_play_chaua').className = "";
	$('link_top_play_aumy').className = "";

	$('link_'+tab_id).className = "tichhopstar_current";
	$('tab_content').innerHTML = $(tab_id).innerHTML;
	$('link_'+tab_id).blur();
	return false;
}