// JavaScript Document
var xmlHttp;
var url

function displayUserName(status) {

	try { // Firefox, Opera 8.0+, Safari
  		xmlHttp=new XMLHttpRequest();
  	}
	catch(e) { // Internet Explorer

  		try {
    		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    	}
  		catch(e) {

    		try {
      			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      		}
    		catch(e) {
      			alert("Your browser does not support AJAX!");
      			return false;
      		}
    	}
  	}

	xmlHttp.onreadystatechange=requestSender;

	if(status =='login') {
		url = "log-user.php?status=login";
	}else {
		url = "log-user.php?status=logout"; 
	}
	
	xmlHttp.open("GET", url, true);
	xmlHttp.send(null);

}

function requestSender() {

	if(xmlHttp.readyState==4) {

		var response = xmlHttp.responseText;		
			
			document.getElementById("user").innerHTML= response;
			
	}

}