function checkResult(){
if(request.readyState == 4){
var myDiv = document.getElementById("servertime");
myDiv.innerHTML = request.responseText;
}
}
function getServerTime(){
request = new XMLHttpRequest();
var url = "servertime.php";
request.open("GET", url, true);
request.onreadystatechange = checkResult;
request.send(null);
setTimeout ( "getServerTime()", 1000 );
}