// JavaScript Document
function changeNav(cur)
{
var subnav=document.getElementById("subnav").getElementsByTagName("span");
	for(var i=0;i<subnav.length;i++)
	{
		subnav[i].className='subnav_hidden';
	}
subnav[cur].className='subnav_show';

}
function changePanel(elementId,currentPanel)
{
var panel_buttons=document.getElementById(elementId).getElementsByTagName("li");
var panels=document.getElementById(elementId).getElementsByTagName("div");
var curbtnclass="cur_"+elementId+"_panel"
var freebtnclass="free_"+elementId+"_panel"
	for(var i=0;i<panel_buttons.length;i++)
	{
		panel_buttons[i].className=freebtnclass;
	}
panel_buttons[currentPanel].className=curbtnclass;
	for(var i=0;i<panels.length;i++)
	{
		panels[i].className='panelhidden';
	}
panels[currentPanel].className='panelshow';
}