// JavaScript Document

function changedisplay() {
    if ( typeof changedisplay.counter == 'undefined' ) {
        changedisplay.counter = 1;
		changedisplay.olddiv =  document.getElementById("container1");
    } 
	++changedisplay.counter;
	if (changedisplay.counter > 3) {changedisplay.counter = 1;}
	var newvisible = document.getElementById("container"+changedisplay.counter);
	changedisplay.olddiv.style.display = "none";
	changedisplay.olddiv.style.visibility = "hidden";
	newvisible.style.display = "block";
    newvisible.style.visibility = "visible";
	changedisplay.olddiv = newvisible; 
	myTimeer = window.setTimeout("changedisplay()",10000);
}