function validate_email(theEmail) {

    if(-1 == theEmail.indexOf("@")) {
       alert("Your email must have a '@'.");
       return false;
    }
    if(-1 != theEmail.indexOf(",")) {
       alert("Your email must not have a ',' in it");
       return false;
    }
    if(-1 != theEmail.indexOf("#")) {
       alert("Your email must not have an '#' in it." );
       return false;
    }
    if(-1 != theEmail.indexOf("!")) {
       alert("Your email must not have a '!' in it." );
       return false;
    }
    if(-1 != theEmail.indexOf(" ")) {
       alert("Your email must not have a space in it." );
       return false;
    }
    if(theEmail.length == (theEmail.indexOf("@")+1) ) {
       alert("Your email must have a domain name after the '@'.");
       return false;
    }
    if(theEmail.length == 0) {
      alert("Please enter your email.");
      return false;
    }
    return true;
}