function mail(strEmail)	{
	var error;
	re = new RegExp("^([0-9a-zA-Z-_.]+)(@{1})([0-9a-zA-Z-_.]+)([.]{1})([a-zA-Z]{2,4})$")
	if (!re.test(strEmail)) {
		return false;
	} else {
		var cpt = 0;
		var arob = strEmail.indexOf("@", cpt);
		while (strEmail.indexOf(".", cpt) != -1) {
			strTemp = strEmail.indexOf(".", cpt);
			if ((strTemp == 0) || (strTemp == cpt) || (strTemp == arob -1) || (strTemp == arob +1)) {
				error = "erreur";
				break; 
			} 
			cpt = strTemp + 1;
		}
		
		if (error)
			return false;
		else
			return true;
	}
}