problema de validación con caracter &

[ZiTAL]

Código:

var amper='&'
				amper=amper.substr(0,1);
				
				new Ajax.Request("email_form_process.php", {
					   method: 'post',
					   postBody: "name="+$F("name")+amper"email="+$F("email")+amper"message="+$F("message"),
					   onComplete: showResponse
});