JS Check Your Connection Status Constantly

<script>
var connection = navigator.connection || navigator.mozConnection || navigator.webkitConnection;
var type = connection.type;
function updateConnectionStatus() {
if(connection.type=='none'){
document.writeln("<center><body bgcolor=000000><h2><font color=skyblue>No Connection Found!!<br><br></h2>");
}else{
document.writeln("<center><body bgcolor=000000><h1><font color=skyblue>Connection Established!!<br><br></h1>");
}
}
connection.addEventListener('typechange', updateConnectionStatus);
</script>