// JavaScript Document
function chg_monitor1() {
	document.getElementById("moni_back1").style.visibility = "visible";
	document.getElementById("moni_back2").style.visibility = "hidden";
	document.getElementById("moni_back_aus").style.visibility = "hidden";
}
function chg_monitor2() {
	document.getElementById("moni_back2").style.visibility = "visible";
	document.getElementById("moni_back1").style.visibility = "hidden";
	document.getElementById("moni_back_aus").style.visibility = "hidden";
	
}
function chg_monitor_aus() {
	document.getElementById("moni_back_aus").style.visibility = "visible";
	document.getElementById("moni_back1").style.visibility = "hidden";
	document.getElementById("moni_back2").style.visibility = "hidden";
	
}