function ismail(email) {
	var index1;
	var index2;
	var espace;

	index1 = email.indexOf("@")
	index2 = email.indexOf(".")
	espace = email.indexOf(" ")
	
	if (   (index1==-1) 
		|| (index1==0)
		|| (index1==(email.length-1))
		|| (index2==-1)
		|| (index2==(email.length-1))
		|| (eval(espace)>0)
		|| (email.length < 6)
		|| (eval(email.indexOf("%"))>0)
		|| (eval(email.indexOf("'"))>0)
		|| (eval(email.indexOf(")"))>0)
		|| (eval(email.indexOf("("))>0)
		|| (eval(email.indexOf("]"))>0)
		|| (eval(email.indexOf("["))>0)
		|| (eval(email.indexOf(":"))>0)
		|| (eval(email.indexOf(";"))>0)
		|| (eval(email.indexOf("*"))>0)
		|| (eval(email.indexOf("/"))>0)
		|| (eval(email.indexOf("é"))>0)
		|| (eval(email.indexOf("è"))>0)
		|| (eval(email.indexOf("à"))>0)
		|| (eval(email.indexOf("ù"))>0)
		|| (eval(email.indexOf("<"))>0)
		|| (eval(email.indexOf(">"))>0)
		|| (eval(email.indexOf(","))>0)
		|| (eval(email.indexOf("§"))>0)
		|| (eval(email.indexOf("?"))>0)
	   ){
	document.newsletter.mail.focus();
		alert("Vous devez obligatoirement indiquer un email valide \ndu type  \"votre_nom@un_domaine.com\""); 		
		return false;
		}
	else{
		return true;
		}
}

function Verif()
{
if (ismail(document.newsletter.mail.value)){return document.newsletter.submit();}  
else {return false;}
}