function getHTTPObject(){
   	if (window.ActiveXObject) return new ActiveXObject("Microsoft.XMLHTTP");
      else if (window.XMLHttpRequest) return new XMLHttpRequest();
   	  else {
      alert("Your browser does not support AJAX.");
   	  return null;
	}
}
function check_online(nome){
	document.getElementById('pl_status').innerHTML = "<img src='images/carregando.gif' alt='loader' />";
	httpObject = getHTTPObject();
	if (httpObject != null) {
		httpObject.open('POST','lib/check_online.php',true);
		httpObject.setRequestHeader("Method","POST lib/check_online.php HTTP/1.1");
		httpObject.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=ISO-8859-1");
		httpObject.send("nome="+nome);
		httpObject.onreadystatechange = function() {
			if(httpObject.readyState == 4){
				document.getElementById('pl_status').innerHTML = httpObject.responseText;
		}  
	  }
   }
}