function ajax()
{
    var xhr=null;
    
    if (window.XMLHttpRequest) { 
        xhr = new XMLHttpRequest();
    }
    else if (window.ActiveXObject) 
    {
        xhr = new ActiveXObject("Microsoft.XMLHTTP");
    }
    //on definit l'appel de la fonction au retour serveur
    xhr.onreadystatechange = function() { alert_ajax(xhr); };
    
	    
    xhr.open("POST", ROOTURL+"/ajax/gds.php", true);
	xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	
		
    Login_erreurMsg = document.getElementById("erreurMsg");
	
	emailLogin = document.getElementById("emailLogin").value;		
	pwdLogin = document.getElementById("pwdLogin").value;
	
		
	if(emailLogin == "")
	{		
		alert(Login_Empty);	
	}
	else{
		
		if(pwdLogin == "")
		{
			alert(Pwd_Empty);			
		}
		else{
			xhr.send("emailLogin="+emailLogin);	
		}
		
			
	}
	
	
}

function hideErreur(elementId)
{	
	document.getElementById(elementId).className="erreurMsgOff";
}

function alert_ajax(xhr)
{
    
	Login_erreurMsg = document.getElementById("erreurMsg");
	
	if (xhr.readyState==4) 
    {
    	var docXML= xhr.responseXML;
    	var items = docXML.getElementsByTagName("donnee")
		
		gds = items.item(0).firstChild.data;				
		
		if(gds == 0)
		{			
			document.getElementById("hashLogin").value = hex_sha1(gds+document.getElementById("pwdLogin").value+gds);		
		
		Login_erreurMsg.className="erreurMsgOn";
		Login_erreurMsg.innerHTML = "... Connecting ...";		
		document.getElementById("pwdLogin").value = "emptypwd";		
		
		setTimeout("hideErreur('erreurMsg');", 100200);
		document.getElementById("formLogin").submit();
		}
		else{

		if(gds == 1)	
		{
			alert(Valid_NickName);			
		}
		else{
							
		document.getElementById("hashLogin").value = hex_sha1(gds+document.getElementById("pwdLogin").value+gds);		
		
		Login_erreurMsg.className="erreurMsgOn";
		Login_erreurMsg.innerHTML = "... Connecting ...";		
		document.getElementById("pwdLogin").value = "emptypwd";		
		
		setTimeout("hideErreur('erreurMsg');", 100200);
		document.getElementById("formLogin").submit();
		
		}
		}
    }
}