function switchtabs(t)
{
	var numberOfTabs = 5;
	// each tab content area is named tab1, tab2 etc..
	// each tab head is named thead1, thead2 etc...
	for (i = 1; i <= numberOfTabs; i++)
	{
		el = document.getElementById("tab" + i);
		elhead = document.getElementById("thead" + i);
		if (el != null && elhead != null) {
			if (i == t)
			{
				el.style.display = "";
				elhead.className = "current";
			}
			else
			{
				el.style.display = "none";
				elhead.className = "";
			}
		}
	}
}