function SwitchTab(tabId)
{
	for(var i = 1; i <= 4; i++)
	{
		var tabName = "tab" + i;
		var panelName = "panel" + i;
		
		if(i == tabId)
		{
			document.getElementById(tabName).className = "tabactive";
			document.getElementById(panelName).style.display = "block";
		}
		else
		{
			document.getElementById(tabName).className = "tabinactive";
			document.getElementById(panelName).style.display = "none";
		}
	}
}