function signin(user_email)
{
	var OAjax;
	if (window.XMLHttpRequest) OAjax = new XMLHttpRequest();
	else if (window.ActiveXObject) OAjax = new ActiveXObject('Microsoft.XMLHTTP'); 
	OAjax.open('POST',"newsletter.php",true);
	OAjax.onreadystatechange = function()
	{
		if (OAjax.readyState == 4 && OAjax.status==200)
		{
			if (document.getElementById) 
			{	
				if (OAjax.responseText =='true') {
  				window.location.replace("http://www.tpl.fr/index.php?rub=7&page=2");

  				
				}else{
				  alert("Inscription à la newsletter:\nVotre adresse e-mail n'est pas correcte.");
				}
			}
		}
	}
	OAjax.setRequestHeader('Content-type','application/x-www-form-urlencoded');
	OAjax.send('user_email='+user_email);
  
}