// JavaScript Document
last_tab = 'tab1';
function show(layerName)
{ 
	document.getElementById(layerName).style.display = '';			
} 

function hide(layerName)
{
	document.getElementById(layerName).style.display = 'none';
} 

function show_next(tab_name,val)
{
	document.getElementById(last_tab).className = 'normal';
	var curr = document.getElementById(tab_name);
	curr.className='selected';
	hide(last_tab+'_data');
	show(tab_name+'_data');
	last_tab=tab_name;
}