var panels = new Array('panel1', 'panel2');
var selectedTab = null;
function showPanel(tab, name)
{
	if (selectedTab) 
{
	selectedTab.className='tab';
}
	selectedTab = tab;
	selectedTab.className='tab_select';

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