var panels = new Array('sc1', 'fv1', 'hc1', 'na1', 'as1');
var curPanel = 0;

function showNext()
{
	curPanel++;
	if(curPanel == panels.length)
		curPanel = 0;

	for(i = 0; i < panels.length; i++)
		document.getElementById(panels[i]).style.display = (panels[curPanel] == panels[i]) ? 'block':'none';

	return false;
}

function showPrevious()
{
	curPanel--;
	if(curPanel < 0)
		curPanel = panels.length - 1;

	for(i = 0; i < panels.length; i++)
		document.getElementById(panels[i]).style.display = (panels[curPanel] == panels[i]) ? 'block':'none';

	return false;
}