var panels = new Array('panel1', 'panel2', 'panel3', 'panel4');
var selectedTab = null;
var defaultTab = "tabone"

function showPanel(tab, name)
{
  if (selectedTab) 
  {
    selectedTab.className = 'taboff';
  }
  selectedTab = tab;
  selectedTab.className = 'tabon';

  for(i = 0; i < panels.length; i++)
    document.getElementById(panels[i]).style.display = (name == panels[i]) ? 'block':'none';
  return false;
}
	
function init()
{
	selectedTab	= document.getElementById(defaultTab)
	selectedTab.className = "tabon"
	return true;
}
	
window.onload =  init();