// JavaScript Document
var num;
num=0;
setTimeout('change_img()',3000);
function change_img(){
if(num>3) num=0;
setTimeout('setFocus('+num+')',3000);
num++;
tt=setTimeout('change_img()',3000);
} 
function setFocus(id)
{
selectLayer(id);
}
function selectLayer(id)
{
var layers=[document.getElementById("Focus1"),document.getElementById("Focus2"),document.getElementById("Focus3"),document.getElementById("Focus4")];
var layernavs=[document.getElementById("Focusnav1"),document.getElementById("Focusnav2"),document.getElementById("Focusnav3"),document.getElementById("Focusnav4")];
for(var i=0;i<layers.length;i++)
{
if(i==id)
{
layernavs[i].className="active";
layers[i].style.display="block";
}
else
{
layernavs[i].className="";
layers[i].style.display="none";
}
}
}