function showLayer(id){
 	 hideAll(id);
 	 a=document.getElementById(id);
 	 if(a){
 	 	if(a.style.display=="none")a.style.display = "block";
 	 }
}
function restoreLayer(id){
 	 showLayer(id);
 	 window.setTimeout("restoreLayer('"+id+"')",5000);
}
function hideLayerH(id){
 	 var a;
 	 a=document.getElementById(id);
 	 if(a)a.style.display = "none";
}
function hideAll(id){
	if(id!='sub1')hideLayerH('sub1');
	if(id!='sub2')hideLayerH('sub2');
}
function swapImage(name) {
	imgtmp.src=document.images[name].src;
	document.images[name].src=imgs[name].src;
	imgs[name].src=imgtmp.src;
}