var tab_years = new Array ();
tab_years[2004] = 't2004';
tab_years[2005] = 't2005';
tab_years[2006] = 't2006';
tab_years[2007] = 't2007';
tab_years[2008] = 't2008';
tab_years[2009] = 't2009';
tab_years[2010] = 't2010';


function hide_element(id)
{
	var e = document.getElementById(id);
	e.style.display = 'none';
	return;
}

function show_element(id)
{
	var e = document.getElementById(id);
	e.style.display = 'block';
	return;
}

function select_tab(year)
{
	var atab = tab_years[year];
	var ae = document.getElementById(atab);

	for(var i=2004; i <= 2010; i++)
	{
		var tyear = tab_years[i];
		var e = document.getElementById(tyear);
			
		if(e)	// if tXXXX exists
		{
			e.className = 'unselected';
			hide_element(i);
		}
	}

	ae.className = 'selected';
	show_element(year);
	
	return;
}