function ceram_check_mail(user_id)
{
	var xhr_object = null;
	if(window.XMLHttpRequest) 
	// Firefox 
	   xhr_object = new XMLHttpRequest(); 
	else if(window.ActiveXObject) 
	// Internet Explorer 
	   xhr_object = new ActiveXObject("Microsoft.XMLHTTP"); 
	else 
	{ 
	// XMLHttpRequest non supporté par le navigateur 
	   alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest..."); 
	}
	xhr_object.open("GET", "check_mail.php?user_id="+user_id, true); 
	xhr_object.onreadystatechange = function() 
	{
		var sel=document.getElementById("check_mail");
		if(xhr_object.readyState == 4)
		{
//		  alert(xhr_object.responseText);
		  if(("Connection failed" == xhr_object.responseText) || "" == (xhr_object.responseText))
		  		sel.innerHTML="<font color='red'>Connection failed</font>";
		  else
		  {
		  		var retour = xhr_object.responseText.split('|');
		  		document.form_mail._user.value=retour[2];
		  		document.form_mail._pass.value=retour[3];
		  		sel.innerHTML="<a href='#' onClick='document.form_mail.submit()'>"+retour[0]+" new mails </a> (Total:"+retour[1]+")";
		  }	  		
		}
		if(xhr_object.readyState < 4)
		{
		  sel.innerHTML="<font color='green'>Connecting to mail server</font>";
		}
	}
	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); 
	xhr_object.send(null);
}