<!--
// Check all fields
function testnewsletter(myForm)
{
 if ( !testNews(myForm) ) return false;
   return true;
}
// Check the sld form
function testNews(myForm)
{
 email           = myForm.email_newsletter.value;
 len_email       = email.length;

 // fail if email contains spaces
 if ( email.indexOf(' ', 0) > -1) {
    alert("\nIndirizzo E-Mail non corretto.");
    myForm.email_newsletter.value = "";
    myForm.email_newsletter.focus();
    return false;
 }

 // fail if email start with '@'
 if ( email.indexOf('@', 0) == 0) {
    alert("\nIndirizzo E-Mail non corretto.");
    myForm.email_newsletter.value = "";
    myForm.email_newsletter.focus();
    return false;
 }

 // fail if email not contains any '.'
 if ( email.indexOf('.', 0) == -1) {
    alert("\nIndirizzo E-Mail non corretto.");
    myForm.email_newsletter.value = "";
    myForm.email_newsletter.focus();
    return false;
 }

  return true;
}
// -->