function validate()
{if (document.form.email.value != "")
 { if (document.form.email.value.indexOf("@") == -1 || document.form.email.value.indexOf(".") == -1 || document.form.email.value.indexOf(" ") != -1 || document.form.email.value.length < 6)
   { alert("NO. The email address does not appear to be valid.");
     return false; }
   else
   { alert("YES! That email address does appear to be valid.");
     return false; }
 }
 else
 { alert("You have to enter something in the box first.");
   return false; }
}