function display_tab(tab_num)
{	
	document.getElementById('spootnic_banner_0').style.display='none';
	document.getElementById('spootnic_banner_1').style.display='none';
	document.getElementById('spootnic_banner_2').style.display='none';
	document.getElementById('spootnic_banner_3').style.display='none';
	document.getElementById('spootnic_banner_4').style.display='none';
	
	document.getElementById('spootnic_title_0').className='tab_inact';
	document.getElementById('spootnic_title_1').className='tab_inact';
	document.getElementById('spootnic_title_2').className='tab_inact';
	document.getElementById('spootnic_title_3').className='tab_inact';
	document.getElementById('spootnic_title_4').className='tab_inact';
	
	document.getElementById('spootnic_link_0').className='button_inact';
	document.getElementById('spootnic_link_1').className='button_inact';
	document.getElementById('spootnic_link_2').className='button_inact';
	document.getElementById('spootnic_link_3').className='button_inact';
	document.getElementById('spootnic_link_4').className='button_inact';
		
	document.getElementById('spootnic_banner_'+tab_num).style.display='inline';
	document.getElementById('spootnic_title_'+tab_num).className='tab_act';
	document.getElementById('spootnic_link_'+tab_num).className='button_act';
}

var change_tab_timeout = null;

function change_tab(interval,tab_num) 
{
	if ( change_tab_timeout != null ) clearTimeout(change_tab_timeout);
	
	display_tab(tab_num);
	
	var tab_num=(parseInt(tab_num)+1)%5;
	var default_interval=10000;
	var reload_image = "change_tab(\'"+default_interval+"\',\'"+tab_num+"\')";
	
	change_tab_timeout=setTimeout(reload_image, interval);
}

function stop_change_tab()
{
    if ( change_tab_timeout != null ) clearTimeout(change_tab_timeout);
    change_tab_timeout = null;
}