function verifyEmailString(email) {
	if(email.length == 0) { window.alert('Email vide !'); return false; }
	email = email.toLowerCase();
	reg = /^[a-z\d]+((\.|-|_)[a-z\d]+)*@((?![-\d])[a-z\d-]{0,62}[a-z\d]\.){1,4}[a-z]{2,6}$/gi;
	if(email.match(reg) != email || email.substr(email.lastIndexOf("@")).length > 256) { window.alert('Email non valide !'); return false; }
	else { return true; }
}

function verifyEmailInput(email_input,error_class,error_string) {
	email_input.value = email_input.value.toLowerCase();
	email = email_input.value;
	reg = /^[a-z\d]+((\.|-|_)[a-z\d]+)*@((?![-\d])[a-z\d-]{0,62}[a-z\d]\.){1,4}[a-z]{2,6}$/gi;
	if(email.length == 0 || email.match(reg) != email || email.substr(email.lastIndexOf("@")).length > 256) {
		addOrRemoveClassName(email_input,error_class);
		window.alert(error_string);
		return false;
	}
	else { return true; }
}