function show_hide(obj,t,url){
	if (t){
		obj.src = url;
	}else{
		obj.src = '/images/spacer.gif';
	}
}
function activate_shield(t) {
	var obj;
	if (t){
		obj = document.getElementById("shield"+t);
		obj.style.display = 'block';
	}else{
		for (var i=1; i<=3; i++){
			obj = document.getElementById("shield"+i);
			obj.style.display = 'none';
		}
	}
}